Ok so my iphone headphones that came with my iphone 4 have the mic and volume control. A while back my headphones got washed. I hooked them up to my iphone and only the sound worked. Volume control and mic didn't. But recently I got a mac and for no reason really wanted to see if the volume control and mic worked on my mac. And sure enough it worked on there. So why doesn't the volume and mic on the headphones work on my iphone 4? any thoughts???