Character name in the GUI_launcher has nothing to do with invalid account. you can put account 1 account 2 account 3 in the name field it does nothing it is only their for your organization purposes.
if you are getting invalid account you are either typing hte password ot the account in wrong or user name. thats it.
if you are getting invalid account you are either typing hte password ot the account in wrong or user name. thats it.