Hello,
I had the same problem, but I found out I forgot to do the unlock of Win CE.
1. Unlock your Windows CE by this tool:
http://benji46.free.fr/GPS/WinCE%20Unlocker%20V4.rar
Unpack it on your SD card.
Whole forum:http://www.avic411.com/forum/viewtopic.php?f=22&t=6194