I thought I followed them pretty closely too. There is either an error in the original instructions, or something that's confusing and caused me to put it in the wrong spot.
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.