i just wanna chime in and say that i've had this problem with hotkeynet since i started using it a year ago.

hitting pause would turn off my numlock and cause me to autorun in wow.. my workaround was to simply unbind numlock in wow, but it does still disable my numlock when i hit pause. also, it doesnt do this 100% of the time i hit pause, just often enough to be a nuisance. using windows xp if that matters.