Well, I have payed the 5 dollars and I wanna download mmoviper. But when I insert my accountname and password I just dont get in. Am I supposed to get some new acc name and password for it?

Make sure you are using all lowercase for your username. Only your pass should be multicase. If you signed up on Taultunleashed you will need to sign up here as well and it will ask for your tautl info.