crushtub3

I get this error when joinen my Server. I leave the lobby to play and after a short time loading the mission the game crashes. In my MPmissioncache i can find the mission named __cu_mp.pbo (5kb big). The mission on the server should be about 4 MB big and named "test.bornholm". Even when i play with a smaller mission it crashes and the file "__cur_mp.pbo" is 5kb big. The Server is running on Linux.