Ah, I tried to start a new thread, but then the message appears:
vBulletin Message
Smith, you do not have permission to access this page. This could be due to one of several reasons:
Your user account may not have sufficient privileges to access this page. Are you trying to edit someone else's post, access administrative features or some other privileged system?
If you are trying to post, the administrator may have disabled your account, or it may be awaiting activation.
Pherhaps this has the same reason as why this account isn't showing up in the members list.