Splinter Cell PLAYS TOO MUCH!

Okay so this level is rigged. I completed the entire Pakistani Embassy through non-lethal kills so that I could beat that challenge.  At the end, it told me I didn't do it! That's crap - I used nothing but:

• sleeping gas
• crossbow with sticky shockers
• proximity shockers
• hand kills

Those are all non-lethal, right?? I'm going to look this up online and try again before I go to work. Arggh