Music fading different on the iPhone than the PC?

I'm just doing a standard implementation (although I've seen it called a hack on these boards) of a music fade, which works great on the PC/Mac. Unfortunately, on the iPhone, it does nothing. Code below:

%volume = alxgetchannelvolume(2);
	
	if($fadingMusic && %volume > 0.3)               //Moving the music volume down here.
	{
		%volume -= 0.1;	
		
		alxSetChannelVolume(2, %volume);
		schedule(300,0,fadeMusic);
	}
	else if(!$fadingMusic && %volume< 1.0)       //Moving the music volume up here.
	{
		%volume += 0.1;
		
		alxSetChannelVolume(2, %volume);
		schedule(300,0,fadeMusic);
	}

Like I said...works great until I do a device build and then the volume just stays at the constantly highest level. Is there something special I need to do specifically for the iPhone/iPod Touch device builds?

Thanks!