I already tried, changing from Windows to DirectImput. I think there is a 3rd choice so I will try it. Thanks for answering.
Edit: Yep, the third option was the correct one, issue solved. ^^
Hello everybody, like the tittle says, after launching RageMP my mouse stucks in the middle of the screen and if I try to move it, then it turns back to the original position, being impossible to create a character or doing anything else.