Problem to save select tag value in struts2

[saptak patra]

Hi, I am new to Struts2. I am doing a project using Struts2-Spring-Hibernate.
I am facing problem to store data to database.
codes are following :

insertRegion.jsp

<s:form id="insertRegionFrm" name="insertRegionFrm" action="saveRegion" method="POST" theme="simple">
	  <table width="100%" border="0" cellpadding="0" cellspacing="0">
            	
	            <tr>
                  <td width="100%" align="center">
                    <table width="100%" border="0" cellpadding="0" cellspacing="0">
                    <!--SCREEN DESIGN WILL BE STARTED HERE-->                    	
                   		<tr style="height:16px">
		                	<td colspan="4"></td>
	            		</tr>
	            		<tr >
                   			<td width="20%" align="right" >
                       			<a class="">Search Key</a>  
                   			</td>
                            <td colspan="3" align="left">
                            	<table width="212px" border="0" cellpadding="0" cellspacing="0">
	                                <tr style="height:20px">
	                                    <td width="178px" align="left">
		                                	<s:textfield id="valueId" name="value" cssClass="normal_textfield_one_cell_width" theme="simple" onfocus="change_normal_field_to_focused('valueId');" onmouseover="change_normal_field_to_focused('valueId');" onmouseout="change_focused_field_to_normal('valueId');"/>
	                                    </td>	                                    
	                                </tr>
                               	</table>	                                
                            </td>
	                  	</tr>
	                  	<tr style="height:10px">
			                <td colspan="4">
			                </td>
			            </tr>
	                  	<tr>
                   			<td width="20%" align="right">
                       			<a class="">Name</a>  
                   			</td>
                            <td colspan="3" align="left">
                            	<table width="212px" border="0" cellpadding="0" cellspacing="0">
	                                <tr style="height:20px">
	                                    <td width="178px" align="left">
		                                	<s:textfield id="nameId" name="name" cssClass="normal_textfield_one_cell_width" theme="simple" size="60" theme="simple" onfocus="change_normal_field_to_focused('nameId');" onmouseover="change_normal_field_to_focused('nameId');" onmouseout="change_focused_field_to_normal('nameId');"/>
	                                    </td>	                                    
	                                </tr>
                               	</table>	                                
                            </td>
	                  	</tr>
						<tr style="height:10px">
			                <td colspan="4">
			                </td>
			            </tr>
						<tr>
                   			<td width="20%" align="right" valign="top">
                       			<a class="">Description</a>  
                   			</td>
                            <td colspan="3" align="left">
                            	<table width="212px" border="0" cellpadding="0" cellspacing="0">
	                                <tr style="">
	                                    <td width="178px" align="left">
		                                	<s:textarea name="description" cssClass="normal_textarea" theme="simple" cols="46" />
	                                    </td>	                                    
	                                </tr>
                               	</table>	                                
                            </td>
	                  	</tr> 
			            
	            		<tr style="height:10px">
			                <td colspan="4">
			                </td>
			            </tr> 
			            
			            <tr>
                   			<td width="20%" align="right" valign="top">
                       			<a class="">Country</a>  
                   			</td>
                            <td colspan="3" align="left">
                            	<table width="212px" border="0" cellpadding="0" cellspacing="0">
	                                <tr style="">
	                                    <td width="178px" align="left">		                                	
											
											<s:select id="selectCountry" name="country" headerKey="0" headerValue="--- Please Select ---" list="countryList" listKey="%{countryId}" listValue="%{name}">
												
											</s:select>
													 
	                                    </td>	                                    
	                                </tr>
                               	</table>	                                
                            </td>
	                  	</tr> 
			            
	            		<tr style="height:10px">
			                <td colspan="4">
			                </td>
			            </tr>
			             
			            <tr>
                   			<td width="20%" align="right">
                       			<a class="">IsActive</a>  
                   			</td>
                            <td colspan="3" align="left">
                            	<table width="212px" border="0" cellpadding="0" cellspacing="0">
	                                <tr style="height:20px">
	                                    <td width="178px" align="left">
		                                	<s:checkbox name="isActive" cssClass=""/>
	                                    </td>	                                    
	                                </tr>
                               	</table>	                                
                            </td>
	                  	</tr>
	                  	<tr style="height:10px">
			                <td colspan="4">
			                </td>
			            </tr> 
			            
			                      
	                 </table>
	                </td>
	             </tr>
	        </table>
	</s:form>

POJO Class :

Region.java

public class Region 
{
	private long regionId;
	private String name;
	private String value;
	private String description;
	private boolean isActive;
	private Date created;
	private Date updated;
	private Country country;
	
	
	public long getRegionId() {
		return regionId;
	}
	public void setRegionId(long regionId) {
		this.regionId = regionId;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getValue() {
		return value;
	}
	public void setValue(String value) {
		this.value = value;
	}
	public String getDescription() {
		return description;
	}
	public void setDescription(String description) {
		this.description = description;
	}
	public boolean getIsActive() {
		return isActive;
	}
	public void setIsActive(boolean isActive) {
		this.isActive = isActive;
	}
	public Date getCreated() {
		return new Date();
	}
	public void setCreated(Date created) {
		this.created = created;
	}
	public Date getUpdated() {
		return new Date();
	}
	public void setUpdated(Date updated) {
		this.updated = updated;
	}
	public Country getCountry() {
		return country;
	}
	public void setCountry(Country country) {
		this.country = country;
	}
	
			
}

Country List is populated from country table value.
when i going to save Region it gives error like:

java.lang.NoSuchMethodError: org.apache.struts2.interceptor.StrutsConversionErrorInterceptor.escape(Ljava/lang/Object;)Ljava/lang/String;
	at org.apache.struts2.interceptor.StrutsConversionErrorInterceptor.getOverrideExpr(StrutsConversionErrorInterceptor.java:83)
	at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:105)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
	at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
	at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:179)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:89)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:130)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:270)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:126)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:138)
	at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:165)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:179)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)
	at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:498)
	at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
	at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
	at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:861)
	at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
	at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1584)
	at java.lang.Thread.run(Thread.java:662)

I can not find the actual reason. Please help