"Helm, take us in...Gunnery control, target zino...Fire the welcome beam!
Exits are to the left, right and in the back. In case of emergency shotguns, flamerthrowers, and type IV Phaser rifles are located under the seats. If you see a Shivan wandering around, give him your lunch. Oh...and watch out for the Hammer of Ownage and be mindful of Tiara's axe.........
I recall having a similiar problem. First of all, you got any MODs installed? have you restarted your comp? Sounds almost like the RAM is full...
Back up your C:/games/freespace/data/players/ folder and reinstall, see if that helps.