iOS setAnimationDidStopSelector not working?

[Darkroom]

this works fine in OS 3, but it doesn't call fade out in OS2.2? what is the problem?

- (void)animationHasFinished:(NSString *)animationID finished:(BOOL)finished context:(void *)context;
	{
	if ((animationID == @"FadeIn") && finished)
		{
		[self fadeOut];
		}
	}
	
- (void)fadeIn
	{
	[UIView beginAnimations:@"FadeIn" context:NULL];
	[UIView setAnimationDelegate:self];
	[UIView setAnimationDidStopSelector:@selector(animationHasFinished:finished:context:)];
	[UIView setAnimationCurve:UIViewAnimationCurveEaseIn];
	[UIView setAnimationDuration:0.05];
	[self.myView setAlpha:1.0];
	[UIView commitAnimations];
	}
	
- (void)fadeOut
	{
	[UIView beginAnimations:@"FadeOut" context:NULL];
	[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
	[UIView setAnimationDuration:0.45];
	[self.myView setAlpha:0.0];
	[UIView commitAnimations];
	}

[EDIT] solved. 2.2.1 requires "- (void)animationDidStopNSString *)animationID finishedNSNumber *)finished contextvoid *)context;"