iPhone SDK: is it possible to make standard movie player working in portrait orientation?

Question

I tried to use

- (BOOL) shouldAutoRotateToInterfaceOrientation(UIInterfaceOrientation)interfaceOrientation {
    if(interfaceOrientation == UIInterfaceOrientationPortrait) {
        return YES;
    }
}

but it doesn't change anything in a standard movie player. Screen rotates to landscape mode automatically and movie player does not respond to portrait rotation.

However, it works with usual view controllers. The SDK version is 3.1.2

I'm not going to use pre-set video orientation, I need only auto-rotation if it's possible.