Need help with 3g 4.2.1 and Scion Stereo

[xa007xa]

I just upgraded to 4.2.1, did the jailbreak and installed the iPad BB to unlock. Now when I connect to my Pioneer stereo in my Scion, I get "iPod Comm. Error." Now I started getting that when I upgraded to os 3 prior to any jailbreak. But I would just disconnect and reconnect the iPhone and it would work normally. However, now that I've gone to ios 4, i always get the communication error. Anyone know about this and is there a fix out there?

[soulthoughts]

I googled your error and it's pretty common but I didn't find a solution for it.