The Worst Bug There IS!!!!!!!

I play crossfire all the time. It worked fine until ..... it went beserk. While I was playing, I jumped onto a box but instead of landing ... I was rising up into the air like a baloon.
Until it says:
"Disconnected from the server"
This happens to me all the time!
Please someone help.
Even when I load up to a match ... the loading stops and says:
"Client MFC has stopped working"
This happens to me about everyday I play crossfire.

Thanks for help!