Question:

How do I change my username, It didn't accept part of my name...?

You'd have to contact an administrator for a name change, but it will cost you 1k gold. If you just want to make a minor adjustment, they might not make you pay for it (because I know in the past they've changed the case of letters in usernames for free). But that might not be the case anymore.

Either way, to contact an administrator, you need to find someone who's got admin under their username. I think there's a list of all the administrators somewhere, but I can't seem to find it at the moment. When I changed my username, I contacted jellysundae, who took care of it for me. Just send her a pm and you should be good to go! :)