I'm thinking maybe if you allow access to your site with and without the "www", it's working in one case but not the other? I'm not sure what to do about it though - maybe you can change the ajax call url to be relative? (Edit: oh, I see now that's the vb javascript code so you probably can't change it).

So does this mean you dont think it can be fixed?

I think maybe one way to fix it is to have a .htaccess file that redirects everyone to one or the other (if that is in fact the problem). I don't know a lot about .htaccess files so I don't know how to tell you to do it, but I I've seen it mentioned here before so I think if you search you can find it.

I did a search on that error, and I think it's also possible to add an http header to allow access to other urls, but that's probably a little harder to do.

kh99 thanks for your advice ill look into those ideas