Screen not recording

[bulutcy]

Hi,
I am trying to record, camera and touches ok, but screen is not recorded, only black.
My setup is iPhone 5s with iOS 7.0

My application uses storyboard, so I've included this to my appdelegate.m

• (UIWindow *)window
  {
  static UIWindow *customWindow = nil;
  if (!customWindow) customWindow = [[CRUIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
  return customWindow;

}

Any help?

Thanks.