Use Auto for screen resolution and that worked fine for me.
If you have a tablet the screen resolution "auto" is wrong
If I use pure pongo 3d work fine, but not with your mod. Maybe something wrong in my sys.txt
The skin must be installed on a "clean" save folder. Desirable in the presence of gps.
Sys.txt is in the skin pack. Just try to delete the save folder and go through the settings again.