Slow Access to Web Pages

I have a problem with very slow access to web pages on File Maker server 7 Advanced.

The problem is definitely not caused by the proxy or by network problems. I have set up two machines running on one 100M switch. One is running FileMaker sever 7 advanced on Windows 2003 server. The other is running File Maker 7 Developer on Windows XP. There is no proxy or firewalls turned on.

I have setup the same set of files on both machines. The server is sharing the files using File Maker server advanced web publishing. The XP machine is sharing the files using Instant web publishing.

When I use a third machine to connect to these machines the files shared off the XP machine (using IWP) work very well with no problems. When I connect to the same set of files on the server (Using FM Advnaced Web publishing) I get very slow response from the files (it take 3-4 seconds to refresh a web page).

When I connect to either machine using another copy of FileMaker and Open Remote I have no problems with speed issues.

The problem is definitely isolated to the Web Publishing on the server - something is causing this to run at a very slow speed. I can't see anything in the options that looks promising to rectify this. I have already rebuilt this machine once, and the server is not showing any other problems and it is not running any other programs.

Any suggestions would be appreciated as I don't know what else to try from here.