I just installed the grounding wires from SxExCx (thanks). I had the battery disconnected for a bit. When I got everything connected and powered back up, had to reset my radio presets and some other settings. Then I noticed that my Isimple pxamg isn't working. It charges the iphone but it doesn't play through the radio. The radio just cycles between AM, FM1 and FM2 and never pops up to the pxamg/sat connection.

Any ideas? Is there a reset of some kind? The installation manual mentions a "DEV INIT" screen, but that doesn't show up.