Yeah, it's a filtering/blocking mechanism causing this. Must be the way websense is setup that is causing the issue. Normally, or at least from what I've seen where I work, websense will just give a page that says "your coporate policies do not allow access to this site... or this type of site.. something like that). Then some applications which would use blocked methods/sites just don't work. So perhaps it's somewhere in between? Maybe the chat program won't work right, and therefore tries to open a help file which is also at a blocked site, obviously, and just throws a 403 http error message?