WIN CE Resolution problem.

I have a 2Din radio with WinCE 6.0 that came with igo primo that works well. I tried changing to Nextgen but it has a resolution problem. It blows up the image 4x so you can't see anything. I think it must be the skin and sys.txt problem but I can't find the solution.

The unit is 800x480 and should work with NextGen just fine.

How it looks (not my image but same problem):

http://i.imgur.com/fv6hDKL.jpg
http://i.imgur.com/4H7dh89.jpg

Thank you for your help!