InterApplication Navigation in java webdynpro

Hi Gurus ,

Please guide me for the following scenario : -

I have developed an application for InterApplication Navigation i.e one Webdynpro Projcet containing multiple application.

My project contained two applications and defined one parameter to flow from component interface view of 1st application to the component interface view of next application

But on execution of the same following error was found :-

" The initial exception that caused the request to fail, was:

com.sap.tc.webdynpro.services.exceptions.WDRuntimeException: Exit-Plug must no be triggered with an URL when running in portal. Use portal navigation instead to navigate to another application!

And i dont find a wdFirePlug < > method also in my WDP Project in the First Comp InterfaceView . I s it that i have to manually invoke the fireplug out method so that it runs ?

Thanks

Saheli