IF_FPM_UI_BUILDING_BLOCK is not existed in webdynpro

Hi all

I am creating a simple FPM application in webdynpro, When I am typing the interface IF_FPM_UI_BUILDING_BLOCK in the implemented interface tab. an error is displaying in status bar that is " the webdynpro component interface IF_FPM_UI_BUILDING_BLOCK does not exist". where is the problem I can not find.  can any one guied me.

Regards,

Nagendra