Stuck on Lego Star Wars 2 for xbox 360

[SuperMatt]

I'm stuck on chapter 2 return of the jedi. I'm on the main ship of Jabba the hut. I've opened all the sheilds off the generators and got to the cannon shooting them. I can blow up the right one but not the left one. I'm doing the same thing has i did to the other one. I keep restarting it and still doesn't work. Anybody help ? (i am getting annoyed with it and i am ready to break it)

EDIT: Oops wrong section, can a mod move it?

[craig♥]

http://www.gamesradar.com/us/xbox360/game/cheats/cheats.jsp?releaseId=20060508132313851064 look for the FAQ and see what it says for that bit