Lego Star Wars 2 Echo Base Problem

[Hoad]

Hi, I'm on Escape From Echo Base on Lego Star Wars 2, and it's all OK until I get to the hangar and I have to destroy the shield generators with the gun turret. The problem is that I could shoot forever and ever, and the generators wouldn't blow up.. What's wrong and how can it be fixed?

Thanks

[DarthMaulUK]

Have you completed all of the quest to kick off the triggers? It might also be worth downloading the 1.2 Patch if you dont already have it