I've actually checked the values/data: ppgal_ as the prefix for the vBGallery and photopostpro_ for PhotoPost Pro. As far as I can tell - all values I've entered are correct! Of course I could be mistaken. I hope I'm mistaken.
I've just emailed you details to my testboard. If you can - Please verify the info and attempt running the import yourself.
Keeping my fingers crossed that the import works correctly for you.