When I have the casette adapter for my MP3 player in - it will play for an undetermined amount of time which is always random, but then the passenger side speakers won't work. They will just shut off, and the volume will be reduced a little.

With the radio all the speakers work just fine, and it works with the adapter for a while but it will just randomly shut off...

When it happens, I can only hear through the drivers side...

Once and a while I will get the "CLEAN" beep and message, but I have done it and it doesn't help. Do our radios chew up casette adapters or is it my deck?