Having some issues. I'm playing my 2nd gen iPhone I'm my car and all of a sudden alot of static starts coming through the speakers and the volume is low due to the static. But now I put my iPhone 4 n it works perfectly. I tried to update my iPhone and try it again still static n the volume is low. You can't adjust the volume so that trouble shooting on the iPhone is out the question. I don't want to have to connect my iPhone 4 to play music because the screen goes blank while it plays n I can't get calls. What should I do?