Well, CB has it all right (we've been through problem this a lot)
I just logged out, went to the gallery, saw "register" and "Login" buttons - clicked the login button and entered my credentials and got in.
Only thing I can think is try refreshing your browser and trying again.
If you still can't get in PM me your username and password (I can't see your password in your profile) and I'll give it a try. Don't worry about me remembering your password, I'm just like anyone else and have to write my own passwords for the bunches of sites I frequent, in a book, so I don't have to remember it.