Blank Struts Page

Hi !

I am learning to work with struts, after i click on submit button (in a form) i get a blank page. This thing is annoying me because i can't find the solution for a week !

The page has 2 hmtl list option. The first list loads info about a company compartiments, and after hitting "Refresh Employees", the second list should shouw data about all the employees from the selected department.

What is happening ? After hitting "Refresh Employees" i get a blank selectAngajat.do page. If i go Back and Refresh(F5) the second list option shows all the employees from that department.

Does anyone have any idea about this ? I posted some code down:

PersonalBody.jsp

<%@ page import="databeans.*"%> 
<%@ page import="java.sql.Connection"%>
<jsp:useBean id="ss_PersSelected" class="databeans.CompartPersSelectedBean" scope="session"/> 
<html:form action="/selectAngajat.do">
<table width="600" border="1">
<tr>
<td width="174">Selectati un Compartiment:</td>
<td width="213">
<html:select property="compartid">
<%
Connection conn=Utilitati.getConexiune();
java.util.ArrayList listaCompartimente=
    ObiectPersistent.getObjects(Compartimente.class,conn,null); 
conn.close();
for(int i=0;i<listaCompartimente.size();i++) { 
%>
<html :-o	 ption value="<%=((Compartimente)listaCompartimente.get(i)).getCompartid()%>">
<%=((Compartimente)listaCompartimente.get(i)).getNumecompart()%> 
</html :-o	 ption>
<%}%> <%-- s-a inchis for-ul--%>
</html:select>
 
</td>
<td width="191">
<input type="submit" name="Submit" value="Refresh Employees">
</td>
</tr> 
<tr>
<td width="174">Selectati Angajatul:</td> 
<td width="213">
<html:select property="marcaselectata">
<% Connection conn=Utilitati.getConexiune();
if (ss_PersSelected.getCompartid() != null) //exista un compartiment selectat
{ java.util.ArrayList listaAngajati = 
    ObiectPersistent.getObjects(Personal.class,conn,
" where compartid='"+ss_PersSelected.getCompartid()+"' ");
conn.close();
for(int i=0;i<listaAngajati.size();i++){%>
<html :-o	 ption value="<%=((Personal)listaAngajati.get(i)).getMarca().toString()%>">
<%=((Personal)listaAngajati.get(i)).getNumepren()%>
</html :-o	 ption>
<%}}%> <%-- inchidem FOR si IF --%>
</html:select>
</td>
<td width=" 191 ">
<input type="submit" name="Submit2" value="Show Employee">
</td> 
</tr> 
</table>
 
</html:form>
 
<%if (request.getSession().getAttribute("ss_DatePers") != null){%> 
<tiles:insert page="/tiles/bodys/DateAngajatBody.jsp"/> <%} 
    else if (ss_PersSelected.getCompartid() != null){%> 
    <html:form action="/dateAngajat.do">
<html:hidden property="actiune" value="newObject"/> 
<html:submit property="add" value="Angajat Nou" /> 
</html:form>
<%}%>

struts-config.xml

SelectAngajatAction.class

package formactions;
 
import databeans.CompartPersSelectedBean;
 
import databeans.ObiectPersistent;
import databeans.Personal;
import databeans.Utilitati;
 
import java.io.IOException;
 
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
 
import javax.servlet.http.HttpServletResponse;
 
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
 
public class SelectAngajatAction extends Action {
 
    public ActionForward perform(ActionMapping mapping, ActionForm form, 
                                 HttpServletRequest request, 
                                 HttpServletResponse response) throws IOException, 
                                                                      ServletException {
        CompartPersSelectedBean formBean = (CompartPersSelectedBean)form;
        java.sql.Connection conn = null;
 
        if (formBean.getMarcaselectata() != null && 
            formBean.getMarcaselectata().intValue() != -1)
            try { // incarc in sesiune obiectul Personal corespunzator marcii selectate de utilizator 
                conn = Utilitati.getConexiune();
                Personal objPersCurent = 
                    (Personal)ObiectPersistent.getObjects(Personal.class, conn, 
                                                          "where marca=" + 
                                                          formBean.getMarcaselectata().toString()).get(0);
                // ATENTIE! Identificatorul atributului trebuie sl fie cel definit in Struts-Contig.xml 
                request.getSession().setAttribute("ss_DatePers", 
                                                  objPersCurent);

conn.close();
 
            } catch (Exception e) {
                e.printStackTrace();
                if (conn != null)
                    try {
                        conn.close();
                    } catch (Exception err) {
                    err.printStackTrace();
                    }
                return mapping.findForward("eroareBD");
            }
        else // daca marca e null elimin eventualul atribut ss_DatePers anterior
            request.getSession().removeAttribute("ss_DatePers");
 
        return mapping.findForward("success");
    }
}