Can't move playing UT coop

Hi, 

Since this eafc game, i started playing on PC. Everything was working fine until yesterday, when i tried playing coop rivals with my friend and i wasn't able to move using my controller. My controller was working fine, cause i was able to press pause and move in the menus, but in game i was frozen. I played with this friend before and it was working fine. I tried unplugging my keyboard & mouse, we tried both teams and multilple gamemodes, but nothing seems to work. Has anyone else experienced a similair problem?

I am also aware of the steam controller input thing and tried it with and without the input. I also don't experience any problems playing alone. But i really only play coop, so this kinda sucks, since i can't now.

I really hope somebody can help me with this problem, so thanks in advance!