Everytime I try & login to the PTR, it tell's me that,
"There was a problem logging in with this account. You may not have a World of Warcraft game attached to your account, or you may be logging into a different region from the one you created your account in. If you continue having trouble, please contact support."
I do have a WoW game attached as I am still playing the retail version. Not really sure what the problem could be.