[Nate-Sharp]

When i tried to enter the samp server when i first dowlaoded it , it said enter my nick name so my nick name is Nate and thats what i put but i registerd on samp forrums with a diffrent name and every time i try to enter samp on the serve it says the Nate is registerd enter pass and the name im registerd with isnt nate so what do i do, how od i register a diffrent name what do i have to do ? help !!!