Well surprisingly enough that actually worked.I have another idea to try for testing, it probably will be for nothing but might be able to give a clue. What I would say to try is to go ahead and either delete or move the jpg file of the scheme and then take a jpg from somewhere else (like save a picture from a website), then rename it to the name that the jpg for carviewer is supposed to be and then see if it shows up. Make sure the jpg you use though is not something you've saved from your paint program.
If you don't get the white then at least its a start.