Extended Controller Class is not Working

 Hello All,I have extended controller class but unable to find the impact of this extended class on OAF Form.

Code Is 

--------

package xx.oracle.apps.per.selfservice.personalinformation.webui;

import oracle.apps.fnd.framework.OAException;

import oracle.apps.fnd.framework.webui.OAPageContext;

import oracle.apps.fnd.framework.webui.beans.OAWebBean;

import oracle.apps.per.selfservice.personalinformation.webui.ContactsMainCO;

public class xxContactsMainCO extends ContactsMainCO {

    public xxContactsMainCO() 

    {

    }

    

    public void processRequest(OAPageContext pageContext, OAWebBean webBean)  

    {

        System.out.println("testing!");

        throw new OAException("Test !!!!");

      

        

        

        

    }

    public void processFormRequest(OAPageContext pageContext, OAWebBean webBean)  

    {

       

        System.out.println("testing!");

        throw new OAException("test", OAException.INFORMATION);

        

        

    }

}

at form personalization, i have also changed the extended class over seeded one (at site level)