Why doesn't my iPhone work with my Alpine CDE-110?

I just bought an Alpine CDE-110 and when I plug my phone into it via USB it says "USB ERR 1" which means that it isn't compatible or the cord is messed up. My cord is brand new so that can't be the case, and if it means anything it's an iPhone 4 that I'm using. Is there anything I can do to make it work? What exactly IS compatible with this particular head unit. I haven't tried using my auxiliary plug because I don;t have a cord for it so I don't know if that works or not. Any help would be greatly appreciated.

Added (1). I also used an older iPod and it didn't read it. My iPhone works fine, my girlfriend has a USB compatible head unit and we both use our iPhones on them all the time.

Hehehe the most common question to date, "why doesn't my iphone work?"

It isn't compatible

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