Essentially, cos there's a version for the EU, we're locked out of the NA version and redirected to the EU version. You're not meant to break into the other versions, though I know a few folk that are doing it anyway. They seem to be using stuff that's not compatible with my silly laptop though. Besides, I have a feeling I'd be lagtastic in NA, since the EU servers are pretty laggy to start with.
Kaze managed to break into EU for a while, but he didn't like the game and the trial period for the program he used ran out so yeah. I don't know how else that would work.