word press pages in 2.5 Error 404 file not found cause by BBpress

guys help problem here my word press pages in 2.5 displays error file not found…. after I install bb press for its forum i now I uninstall it, now the problem is my word press, it wouldn’t display either its pages i thought it was the bbpress causing of error after installing bbpress because past months i didn’t install bb press i encounter this problem after installing bbpress………. i’m lost even i un install the bb press my pages wouldn’t display either of its content

please help guys