Error 2306 when testing connection

[brianrich]

I am attempting to set up an ODBC connection so that I can get a Filemaker 6 database maintain a Filemaker 7 file hosted on a FMP7 advanced. I am using the ODBC client driver from the FMP7 Pro CD on my WIN 2000 machine. I can start the configuration process but when I try and test the connection, I get an error dialog box titled Sequelink Error: 2306

[DataDirect][ODBC Sequelink Driver][sequelink Client]TCP/IP error, connection refused.

As far as I can determine, this is an error at the FMP7 end - it apparently relates to the number of concurrent connections but the server is very lightly used and presently hosts several databases. One of these supports a CWP application which requires an occasional web search to be executed (say two or three times a day) so I can't see why there should be a connection issue.

FWIW, the clilent and server are separated by a firewall, but we've opened port 2399 for both TCP/IP and UDP, but still no luck.

Anyone any ideas on how to proceed on this?

TIA