filemaker 9 web server host cannot connect to admin server

[apple17]

I have Filemaker 9 server advanced running on 2 boxes. The main server has all the databases. It's set up to use a second server as the web server and web publishing engine. It says everything is fine.

On the second server, I have IIS running and need to set up the PHP assistant options (I think). When I go to launch the Filemaker 9 server, it gives me the message:

admin server connection error the admin console cannot establish a connection to the admin server

When I try to use IWP and Php Site Assisstant, it works okay.

So it's really just the communication from the webserver machine to the master that is an issue.