Collisions crashing game

I have created many many custom environmental objects for game we are working on, however, my player mesh has developed the habit of "sticking" to the collision mesh of the object. The spaceship that is the player mesh will hit a simple collision several times and bounce off, but sooner or later it will hit and stick while the rest of the game either a. slows to a crawl or b. merrily continues at full speed around me.

I have the BraveTree Environmantal pack, and I do not seem to run into this problem with their objects. I used their objects as a starting point, even using their collision meshes, but I still get the sticking problem with anything I have imported.

I am using Max 4 and the Max2dtsexporter. Is there another exporter I can/should be using? Is there a radio button somewhere I am not pushing on export or some bit of model-making esoterica I am missing? I would be happy to provide a copy of one of my files for someone to take a look at.