The request failed with HTTP status 504: Proxy Timeout

This is the error I kept getting while testing my web service that synced data from my intranet to the internet facing database. I *was* testing it between two servers on the intranet and however I optimised my datalayer it wouldn’t go away when syncing table’s that were quite big.

Website Compression: Check ISA 2004

So you have checked the HTTP Headers being sent by your browser and you have confirmed it is sending the ACCEPT-ENCODING header but still the response from IIS (7 in my case) has no CONTENT-ENCODING and your stumped?