On splinter cell chaos theory I have a problem.

On the level: Appartment: Sam keeps falling of the line going from the top of the building to the other building.

Im running on Vista 32 bit, but I have already played the entire game before and just reinstalled it a few days ago.

Hope you guys can help me.

You have to update the game,there was another bug in this level when the elevator wouldn't work as well.

I fixed it myself.
For some reason it gets fixed when you play on a different difficulty level.