at the end of that level, when you have to enter the tomb, the electrified gate doesnt open!
i already have hit the switch, but it still doesnt work!
i've searched for cheats or trainers, but it doesnt exist "noclipping" for crysis 2
anyone can help me? at least, how to begin again a level??

I think you can open console and type:
map ( should be the name for that level).
That should start the level. If you don't know the exact name, just type map and keep pressing Tab, until you find your desired level.

really thank you!