Here is another way I just thought of, and checked offline....there is a way to check to see if your account name works in an NPC offline:
Make an NPC, then put this script in it...
NPC Code:
if (playertouchsme) {setstring #a, accountname;}
that way, you can set your accountname properly, then test it out offline. When you are sure it works, you can then delete the npc that set the accountname.