ios - ScrollView not working in master-detail application on iPad -

i adding uiview subview detailviewcontroller, , have controls in uiscrollview. when showing second view subview in portrait mode , rotate device scrollview working fine ! ...but .. when starting application in portrait mode , add second view, scrollview not working @ all!
missing here ?!
in advance :)

here code adding subview:

[[nsbundle mainbundle] loadnibnamed:@"sendinfoview" owner:self options:nil]; catransition *transition = [catransition animation]; transition.duration = 0.5; transition.type = kcatransitionmovein; [_finalview.layer addanimation:transition forkey:nil]; [self.view addsubview:_finalview];