cann't register user ...help me

[trungnm]

i create free forum : http://trungsfanclub.s1.bizhat.com
but cann't register user ...
error msg: "The confirmation code you entered was incorrect"
help me
thank u very much

[Guttu]

Goto admin panel
General admin -> configurations

then do these changes
Enable account activation set it to none

Enable Visual Confirmation set it to no

save the settings and try to register
I think the problem is second stting
first setting works