CALL OF DUTY - MW beta - error codes and crashes

Game freezes when I level up. Once the Picture of the new rank comes up, it just freezes and then i have to force close it.
*Freezing has occurred when leveling up to 10, 11, and 18 (so far).

Additionally sometimes i get error code message BLZBNTBQS000003F8. This error code happens mostly when the map is loading and it just never proceeds to enter the game. It just freezes, gives me the error message, and tells me to go to desktop.

Anyone have any suggestions to fix it?