OK, I'm stumped and feel like an idiot, I must be missing something.

My iphone 3GS worked fine with my 2008 X5. I purchased the adapter on Amazon to allow it to charge with the included BMW iPod cable.

Now on my 2010 it doesn't work at all. With or without the adapter the iPhone says that it is not charging. And the iDrive system isn't recognizing the iPhone at all.

What am I missing?