I suspect that this is an issue with the "max_input_vars" setting on the server; please see my comment to your post at UBBDev for instructions to test.

Additionally, there is an entry on Wiki: Issues with the PHP 'max_input_vars' Setting

I am a Web Development Contractor, I do not work for UBBCentral. I have provided free User to User Support since the beginning of these support forums.
Do you need Forum Install or Upgrade Services?
Forums: A Gardeners Forum, Scouters World
UBB.threads: UBBWiki, UBB Styles, UBB.Sitemaps
Longtime Supporter & Resident Post-A-Holic
VNC Web Services: Code Modifications, Upgrades, Styling, Coding Services, Disaster Recovery, and more!