<XBOX> Controller stops working during videostreaming

I really would like some help with this one. After a couple of minutes the controller of my XBOX stops functioning when playing a video (stream). The only thing, that helps is rebooting. The normal functions - changing menues etc.- are ok. It's only while playing videos. I changed controller, reinstalled XBMC, keymap.xml etc... No results. Could someone please point me in the right direction?

Any help is greatly appreciated!