I think the client is expecting to get WPAD on port 80. Try to change it back to port 80 and see if it works. I realize you likely have a web server (internal to isa machine) on port 80, as this would be the only reason to change it. I to have an isa internal WWW server, and would love to use port 80, so if you figure it out please detail your findings for us. Regards, Mark S