I'm stuck in the part in Ardenvel Dome, where you have to split up into 3 groups, and turn on 3 switches. I'm stuck in the underwater part, Chapter 6-#20 of the walkthrough. If you look at the link below, I'm right above the room with two switches in it, but there's a gate in the way. No matter what I do, I can't get past it, and the walkthrough doesn't tell me how get through it either. Can someone help?
http://img29.imageshack.us/i/arvandalel ... under.jpg/