This is the same problem I had when I was moving my board to another server, the page just goes blank when you try to post, but I didn't have the UBB Code buttons installed so It wasnt that. This Is what GoTo sugested in the topic I posted.
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.