As per the help file: only CERN proxy servers are supported. I suspect your proxy does not adhere to CERN standards. Neither does mine. However, Microsoft provides the nifty WinHttp.WinHttpRequest.5.1 object, which does the job nicely. The following works just fine on my network, and works in both Integrated Security and non Integrated Security modes. I prefer the Integrated Security mode, as I don't like to put passwords in unencrypted files if I can help it. ;set parameters for using