So Frostlass referred you here, eh?
Well you know what that means, don't you?
(Good, because I have no idea.)
Welcome to the Pokécommunity!
I'm sure you will get that little error fixed in no time at all.
As everyone has already stated, you are welcome to have Higher Staff change your user name. We all make mistakes and it's not your fault.
I'm sure any member with a user name in green, red, or purple would be glad to help you there. Just send a friendly little PM their way.
Please do enjoy yourself!