Unable to change template

I have just installed a new template, the install was fine.
I went to the ACP - Config+ - Profile options page to change the "overide User choice" button to no.
When I press submit i get a message says "username and password cannot be the same"
the change doesnt take effect
Anyone any idea what could be wrong, i have no other problems that i know of <img>
I went to the ACP - Config+ - Profile options page to change the "overide User choice" button to no.
When I press submit i get a message says "username and password cannot be the same"
the change doesnt take effect
Anyone any idea what could be wrong, i have no other problems that i know of <img>