Hi Sarah,
I have redeployed the web server and still no joy. I get the same issue as above when using internal or external IP and the URL you provided so I don't think anything has changed?
I have been playing and thought it was an issue with IIS, but I can't understand why my files are accessible remotely in FM pro and GO, yet mirrorsync has an issue?
Just to ensure I'm not causing issues for something else - I have PHP disabled, IWP disabled (I have standard server) and XML enavled. ODBC is also disabled.