Cannot find ActionMappings or ActionFormBeans collection

Hi All,
I'm struggling with multibox operation on my ArrayList.
I able to print the data which are stored in the stList.
But i want the use checkbox on those items to make new arralist of selected items.

I pasted my display.jsp.
Please Help Me.

<body>
	
		<html:link href="index.jsp">Home</html:link>
		<br>
		<html:form styleId="myForm"
			   action="/studentList?ListAction=acceptrejectUser" method="post">
			
					
		<%
			ArrayList<StudentBean> stList=StudentBean.getStList();
			request.setAttribute("stList", stList);
		%>
		<table border="1">
			<tr><center><h3>Applicants List</h3></center></tr>
			<tr>
				<td>Name         </td>
				<td>Sex         </td>
				<td>Address          </td>
				<td>Contact No          </td>
				<td>College Name          </td>
				<td>Branch          </td>
				<td>CET Rank          </td>
			</tr>
			<logic:iterate id="StudentId" name="stList" type="com.test.bean.StudentBean" >
			<%-- <tr><html:checkbox name="FinalForm" property="Student" />	</tr>--%>
			<html:multibox property="selectedStudents">
			<tr>
				
				 	
				 	<td><bean:write name="StudentId" property="sName"/></td>
					<td><bean:write name="StudentId" property="sGender"/></td>       
					<td><bean:write name="StudentId" property="sAddress"/></td>
					<td><bean:write name="StudentId" property="sContactNo"/></td>
					<td><bean:write name="StudentId" property="sCollegeName"/></td>
					<td><bean:write name="StudentId" property="sBranch"/></td>
					<td><bean:write name="StudentId" property="sCetRank"/></td>
					
			</tr>
			</html:multibox>
			</logic:iterate>	
		</table>

<html:submit  value='Accept' ></html:submit>      <html:submit value="Reject" ></html:submit>
	</html:form>	
	
</body>
</html:html>