hiya, I've got an ipod shuffle an for some reason the ipod has stopped sending a signal to the left head phone. I tested the headphones with other mp3's and they work fine, i've even got different sets of headphones and tested them on the ipod and still the problem occurs. However, i have to move the headphone about or poke it out slightly for them to work now why is that and are there any suggestions on how to fix this problem?