Important Cutscenes won't trigger

[The Dread Cthulu]

For some reasons, important cutscenes won't trigger when reaching critical moments in the game. Even though I walked all around the rebuilt Jedi Enclave, Kreia won't appear and reveal herself as Darth Traya. I've killed all the Jedi Masters and am aware that there should still be some point in the level that triggers the scene. I've tried placing Kreia into my party, but after the scene where we walk around the trees and nothing happens. Help is desperately wanted and needed since I'm about 2 or 3 hours away from completing the game.

 

EDIT: SYstem Specs

 

Windows Vista 32 bit

Nvidia 8800 Gt, latest drivers as of Monday, November 2, 2009

3 GB RAM

Intel Core 2 Duo 1.8 Ghz Processor

Edited November 27, 2009 by The Dread Cthulu