Help Galaxy Nexus Stays in Car Mode

[kittenparade]

Hey guys, Sorry if this has already been covered but I searched everywhere and I couldn't find anything. I recently acquired the Galaxy Nexus Car dock with the pogo pins. I am using a Sprint phone and modified the dock appropriately. The dock appears the work fine. When I take the phone out of the dock though, it thinks its still in the dock and charging. I get the lighting bolt through the battery thing and when I turn the phone on its side, it changes to landscape. The only way to get it out of this, is to restart the phone. Any info on this problem would be much appreciated. For the record its unrooted.