rfactor keeps crashing to deesktop

[kokopelli]

Everytime i try to load a track, rfactor keeps crashing to desktop, (without any error messages), when i load a track without X-Sim Extrator, the tracks load without problems. rfactor will start, i can change settings, almost everything, but i cannot load a track without the game crashing to desktop. I have re-installed X-Sim & rfactor serveral times, but the problem keeps happening. I have also installed all the updates from mircosoft, but still no success. I do not know if there is a patch or something for this kind of problem. If anyone can help me out, Thanks in advance