[northwestuk]

I want to pay for membership to the one click pass sites, but when I go to the site page where it says

"OCC Members Upgrade Here
If you already registered a username on the One Click Chicks forum, all you need to do is click here to upgrade your membership. You do not need to create a new username. Just make sure you enter the same username and password you use to login at OCC. "

But it tells me my username isn't valid
Any help would be appreciated, as I would like to keep my username

Thanks
PS
This is what It says

NOTE: If you are not registered at OCC, please use our New Sign Up Page to create a new membership.
Username 'northwestuk' was not found in our database.
Please make sure the spelling is correct and note that usernames are case-sensitive.

Click here to sign up for a membership with a new username.