amazing game except i cant play it

ive tryed loading and reloading the game, deleting and redownloading it, and everything else i can think of but on the first level when i turn on the turrent gun (the defense system), it wont let me interact with the gun to shoot open the first door. i remember this game from childhood and would love to give it a 5 star but as of right now its unplayable. :(

Darius263 about Star Wars Jedi Knight II: Jedi Outcast