It was all working fine until I tried to use a tables plugin. I don't think the tables caused the problem, I use it on another site. I can only use themes which I had previously installed. Although I can upload new stuff ok, they just won't work.
I am getting stuff like this in files, in my file manager:
Fatal error: Call to undefined function _deprecated_file() in /hermes/bosweb/web253/b2539/ipg.energyadvisecom/wp-includes/theme-compat/comments-popup.php on line 10
I was using W3 cache, which I have deleted for now, because I suspect this had something to do with the problem.
I tried deleting all plugins, removing files, and reloaded WordPress 3.0.5
Any help please