Jamin, try it at different times of the day. I found it hard to get running during the late afternoons, but haven't had problems earlier. It might just be the site getting slammed.
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.