BTB error: exporting failure?

I made a track, exported it to rFactor, and it shows up in the track selection, but during the loading I get an error, so it doesn't load up.
I think the problem is my custom texture, which I put into BTB with the xpacker. Do you guys think I did something wrong with the xpacker?
Hi TopSpeeder,

i dont know how its done in rfactor, but if you could launch the game with the settings, that it creates a trace file, that could find the reason for the freezes. in the trace file, the game logs what it is doing, and also writes errors like texture, object or material errors in it. (at least thats what gtr2 and r07 are doing).