Namspoofer doesn't seem to work



I dwnloaded the namespooofer,but everytime I try it while in a Diablo game it says "Ragnorok server must be running!" what does that mean?Is Ragnorok a different game?If it is a different game then how come it shows up on Diablo Hacks?Plz respond to this thread if u have any answers o my questions.;)