So, I have some headphones/mic with the 3-stripe tip that I use with my iPhone. The button on it allows me to play/pause/skip songs, and the mic works as it should. However, when I tried it on a friend's gen2 iPod Touch, none of those functions work. What's going on here? I thought it's supposed to be compatible with external mics. I'm not paying Apple $80 for headphones....that's crazy.