Subsonic Forum

Alright so I installed subsonic and I tried to open it, then a screen with a login appeared. It said use 'admin' as the password. I tried using my username and password for the forum but that didn't work, and neither did using my username from this forum and 'admin' as the password.

My question is How do I register for Subsonic, or have I already but it's just not working?

As stated in the installation guide. Use admin as username and admin as password. Then change that after your first login.