My keyboard and mouse stop working for a couple seconds in game every couple minutes.

So i downloaded Crossfire 2 months ago and played it and when i joined a game i would play for a couple minutes and my keyboard and mouse stop working and my character walks in one direction for a couple minutes and after that everything works again,but the same thing happens after a couple minutes.........After a patch it worked fine...But now The NightFall Patch came and my problem started going agian.