Carfilter Problem

[hage]

I have a Problem when selecting a single class from a mod using the Carfilter for a single race.
I select the Class , select my car, do all the settings, start the race and then I´m the only car on the track. I only own the supertouring Mod but it´s happening with several classes from the extra Skinpacks, theres only one class (Pre Super Touring 92) where this doesn´t happen.

I hope there are some guys out there that could help, I only installed Race07 again because of this mod.