iOS Question Problem with toolbar in release mode

Hi everybody,
i'm having a problem with my app when in release mode.. I added a toolbar, which is customized with a red background color and white items... all is fine until i'm in debug mode... during debug i can see everything working right.
But in release mode i can't see the toolbar anymore... i only see a black empty toolbar and no items... can anybody tell me what's wrong?

thanks in advance