Firewall Porting Issue - X Serve 10.3 - FM Server7

I have an xServe G5 running OS X 10.3.8 Server. I have FileMaker Server 7v3

installed on this xServe, and I want to make FileMaker Server accessible to

my LAN, but not to my WAN.

I am running OS X Server's firewall, and have been unable to open TCP port

5003 (FileMaker's port) correctly for LAN traffic. I know that the FM Server

is working, because I can connect from my LAN just fine when I turn the

FireWall off (using the LAN IP).

In OS X Server's FireWall, I click on Settings, then Advanced, and click

"plus." I entered the following:

Action: Allow

Protocol: TCP

Service: Other

Under Source, I entered:

Address: 192.168-net (for the LAN)

Port: 5003

Under Destination, I entered:

Address: 192.168-net

Port: 5003

Interface: IN

I click save, then I stop and start the FireWall service. I test from a

FileMaker Pro 7 client, and have no luck. I turn off the firewall, and boom,

I can connect.

On a test server, I used Brickhouse, and was successful at adding a port

5003, which allows me to connect from FileMaker Pro 7. However, once I did

that, it now takes me 10 minutes to connect to the test server via Server

Admin (even when I run server admin on that test server), so I am hesitant

to use Brickhouse on my production server.

The settings described above, BTW, are identical to the setting Brickhouse

inserted into my test server's firewall....

I did NOT reboot the xServe after creating these filters, but I did stop and

start the Firewall service. I also repaired the permissions.

Any ideas?