Avoid Login user id and password while running Webdynpro ABAP

Hello All,

I have created a custom web dynpro application and calling it inside SAP standard web dynpro application  FITV_POWL_TRIPS. The application is called success fully but the problem is that when it is called, system popups for R/3 login details that is SAP GUI user id and password.

It is not performing general Single Sign On (SSO). How i can avoid this pop up.

Thanks

Faiz Khan