I have an iphone 3gs and recently had an update (sorry forgot which one but had to temporarily take fire wall off pc to get it to update) now the iphone will charge on the docking station but wont play tunes through iPod on my docking station.(without using the Audio In lead)  I did take my phone to Sony shop & it played OK on their system, I have not moved or changed anything about my own docking system.  Any ideas??