Reply to traktor fx wont turn off

This is a simple problem but i cant find anything on the net

I use my beatmasher faders to activate my FX but when i go to turn them off but putting the faders back to their original postion my beatmasher2 FX wont turn off!! I have to manually turn it off by pressing a beatmasher button.

This has never happened before btw, had this MF for over a year now.

What could be the problem?