I have Splinter Cell Double Agent for PC, and am encountering a problem in the JBA HQ-1 Level (3rd Mission). At the end of the mission, I follow the JBA person to the interrogation room to either kill (JBA objective) or not kill (NSA objective) Cole Yeager. However, when the JBA person walks into the room and it shows the scene with Yeager tied up, the game "stops." I have no control over Sam Fisher, and none of my keyboard keys work. It doesn't really freeze, either--the music still plays normally, and the animation still continues.
This same issue is described here:

http://forums.ubi.com/eve/forums?a=tpc&s=400102&f=36510...911058026#2911058026

Can someone please respond and help, or is there any way to bypass this mission? Otherwise, the game is essentially stuck.