I've been running XOOPS for a couple of years now on a site without very few problems (most of the problems that I've had were caused by people trying to hack in or bad module interactions), but now I've got a problem I can't seem to fix: I am unable to edit, generate, or upload template files. When I try to generate, I get the green box that says "Press the button below to generate file(s)" and then I get "Installing module template files for template set GreyTemplates...", at which point the system hangs. If I try to upload a template, I get a blank screen. Same thing happens when I try to edit one.

Anyone have an idea about what might be causing this?

Forgot to mention this, also:

The content pages associated with some tempalte files would not display until I deleted the templates. Once I delete them, they display fine, but I lose all my customization and cannot upload or edit them again.