Mass Effect 3 Citadel DLC

I Bought the mass effect 3 dlc and after playing my shepard so i am able to play the dlc then yes i can play but one thing that annoys me is the fact that i pay money for a good dlc wich in the boss fight doesnt work!! Everytime (tried 3 times now) the clone shepard is looking like he is falling out of the plane the game freezes and crashes FIX THIS!!! its a dlc that people pay money for.... THEN ITS SHOULD BE BUGFREE WHEN YOU PAY 80 DANISH KRONER FOR THIS!!