I cannot get request.ServerVariables("HTTP_REFERER") to work. I know it won't work if the URL is typed in directly, but I can't get it to work under any circumstances. In fact, when I use code to loop through and list every item in the serverVariables collection, HTTP_REFERER is not even listed, like the item doesn't even exist. I am using IIS 5.0 on Windows 2000, but I don't know if that has anything to do with it. Any ideas?