maybe ur user name when u create ur profile has been used..
-need to verified.

btw, i have an issue with the game as well.
my Xp profile is Admin. but when i go online multiplayer. i'll get kicked in 20sec..
some dunno wat error.
but if i create another user profile put on admin rights, it turn out okay.
but everytime i restart pc. the created profile with admin rights are no longer exist...
so do d saved multiplayer profile.. T_T....

i'm thinking 2 method of soulution..
but no clue how to get it done..

- using back default admin profile... solve the 20 sec kick error

- Solve and remain the created profile with admin rights.