Bean class does not store values

hi
I have a jsp page like. i am using Struts.
<body>
<form name="form" action="bluhbluh">
<logic:present name="address">
<logic:iterate id="RequestDVO" name="address">
TABLE align='center' border='1' cellPadding='5' cellSpacing='1' width="60%" style="border-color:#006600">
<TR>
<TD class="label" colspan="1" style="color:#000000">Shipment Quantity</TD>
          <TD class="note1" colspan="1" NOWRAP="true"><bean:write name="RequestDVO" property="shipQuantity"/></TD>
          <TD class="label" colspan="1" style="color:#000000"></TD>
<TD class="label" colspan="1" style="color:#000000"></TD>
     </TR>
     <TR>
<TD class="label" colspan="1" style="color:#000000">Address1</TD>
          <TD class="note1" colspan="1" NOWRAP="true"><bean:write name="RequestDVO" property="shipCntrAddLine1"/></TD>
<TD class="label" colspan="1" style="color:#000000"> Address2</TD>
          <TD class="note1" colspan="1" NOWRAP="true"><bean:write name="RequestDVO" property="shipCntrAddLine2"/></TD>
</TR>
</logic:iterate>
</TABLE><P><P>
</logic:present>
</form>
</BODY>
"logic" used because i am displaying value from bean class using list thats in session scope and it set the value to "address". RequestDVO is my bean class.
if i submit the form it has to store the value again in database. but while inserting it shows that all the fields are null. so please help me how to handle this.
my action class for doing this is
public class NewRequestAction extends Action
     private static Log log = LogFactory.getLog(NewRequestAction.class);
     public ActionForward execute(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
     RequestDVO requestDVO=(RequestDVO) form;
     RequestHelper requesthelper=new RequestHelper();
     requesthelper.newRequest(requestDVO);
return mapping.findForward("requestsuccess");
i have imported necessary file to handle action class
so how i can handle this

<body>
<form name="form" action="bluhbluh">
<logic:present name="address">
<logic:iterate id="RequestDVO" name="address">
TABLE align='center' border='1' cellPadding='5' cellSpacing='1' width="60%" style="border-color:#006600">
<TR>
<TD class="label" colspan="1" style="color:#000000">Shipment Quantity</TD>
<TD class="note1" colspan="1" NOWRAP="true"><bean:write name="RequestDVO" property="shipQuantity"/></TD>
<TD class="label" colspan="1" style="color:#000000"></TD>
<TD class="label" colspan="1" style="color:#000000"></TD>
</TR>
<TR>
<TD class="label" colspan="1" style="color:#000000">Address1</TD>
<TD class="note1" colspan="1" NOWRAP="true"><bean:write name="RequestDVO" property="shipCntrAddLine1"/></TD>
<TD class="label" colspan="1" style="color:#000000"> Address2</TD>
<TD class="note1" colspan="1" NOWRAP="true"><bean:write name="RequestDVO" property="shipCntrAddLine2"/></TD>
<TD ><INPUT TYPE ="text" name="reason"></TD>
</TR>
</logic:iterate>
</TABLE><P><P>
</logic:present>
</form>
</BODY>
i have an text field at last where user can type then once he clicked ok it has to store the values in database but i dont know why its not doing so

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