Hello Crysis 2 Players out there!

I have a little Problem with my Crysis 2 Maximum Edition o:
you can Unlock the K-VOLT if you are Level 21 (torken and stuff).
so I had unlocked it!

After one Match I had wonder why my K-Volt was greyed, so I thought it was a simple Bug and switched to the Fenline. Then I try to switch back ... but the K-Volt wasn't unlocked and my Torken was gone.

AND I DIDN'T UNLOCK OTHER STUFF
(like the JAW, MARSHALL, AY69)

need Help please o: