Subaru Outback 2010 ipod issues

I purchased a 2010 Outback limited 36R in October 2009. I love the car but the ipod interface has been nothing but problems. It won’t stay connected. I have used 3 cables and 3 differnt ipods. 1 a 5 30gb and 2 ipod touches (2nd and 3rd gen). It unpredictable intervals it will say check connection. I have had it into my Subaru dealer 4 times with not luck. they have no clue. i even opened a ticket with Subaru customer support. Has anyone else had this problem?

I have the HK radio with NAV.