We bought a new Nano. Wife loaded the songs and it's fine with the earphones. When I plug it into the bike all the volumn goes away. You have to put your ear up against the speaker to hear very little. Nano is turned up, speakers on the bike turned up. I'm using the same adapter I got from EC for the ipod. What's wrong? Hard to ride with your ear up against the speaker. Which buttons on the bike need to be on for this to work?