Firewire not seen and Nt environment

I am working on a Mixed node environment with 3 Macintosh systems 4 PCS
One of the Macintosh's has a Firewire external HD attached to it. They are using the Firewire like a Filesharing server. The other 2 Macintoshes see the Firewire from the network without a problem. I obtained the IP address of the Mac with the Firewire and am able to ping without a problem. I can connect to the Mac from the Pc with Network mapping I see other shared directories on the Mac. However I am unable to see the attached Firewire HD. Can anyone assist me in configuring the Firewire for PC's to see it on the Network.

Thanks.

Ronnie
ronnie.jones@ev1.net