in struts,I am Making Action class like this code...

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 LookupAction extends Action
    {
            protected Double getQuote(String symbol)
                {
                    if ( symbol.equalsIgnoreCase("Narendra") )
                        {
                            return new Double(25.00);
                        }
                    return null;
                }
                public ActionForward execute(ActionMapping mapping,ActionForm form,
                        HttpServletRequest request,
                        HttpServletResponse response)
                        throws IOException, ServletException
                    {
                            Double price = null;
                            // Default target to success
                            String target = new String("success");
                            if ( form != null )
                                {
                                        // Use the LookupForm to get the request parameters
                                        LookupForm lookupForm = (LookupForm)form;
                                        String symbol = lookupForm.getSymbol();
                                        price = getQuote(symbol);
                                }
                                // Set the target to failure
                                if ( price == null )
                                    {
                                        target = new String("failure");
                                    }
                                else
                                    {
                                        request.setAttribute("PRICE", price);
                                    }
                                // Forward to the appropriate View
                                return (mapping.findForward(target));
        }
}

But it is not working.but if i will use this code then it is working------

import java.io.IOException;
import java.io.PrintStream;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.*;

public class LookupAction extends Action
{

    public LookupAction()
    {
    }

    protected Double getQuote(String s)
    {
        if(s.equalsIgnoreCase("Narendra"))
            return new Double(25D);
        else
            return null;
    }

    public ActionForward perform(ActionMapping actionmapping, ActionForm actionform, HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse)
        throws IOException, ServletException
    {
        Object obj = null;
        System.out.println("perform");
        if(actionform != null)
        {
            LookupForm lookupform = (LookupForm)actionform;
            String s = lookupform.getSymbol();
            Double double1 = getQuote(s);
        }
        return actionmapping.findForward("success");
    }
}

means when ever i am passing object like target itcis not working
but when evr i m passing "success" it is working.
why?????????
i am waiting 4 reply.
 Regards,
 Nandu