If you haven't done so yet, FTP or telnet to your server and delete all the UBB files and then start over. That link should be there. And if in doubt about your zip, it might be a good idea to download a fresh copy from Infopop to make sure you have all the necessary files.
Doug
Moderator: Community Management
Captain Kirk: "Once again we've saved civilization as we know it."
Dr. McCoy: "And the good news is they're not going to prosecute."