If you installed the UD agent and running the program properly, you have made a password and username. Use THAT username and password, and you should get it, and then click on the "Join This Team" button. Then you should be a member.
Donate to UBBDev today to help aid in Operational, Server and Script Maintenance, and Development costs.
Please also see our parent organization VNC Web Services if you're in the need of a new UBB.threads Install or Upgrade, Site/Server Migrations, or Security and Coding Services.