Windows Server 2003 & Symantec GhostCast 8.3

Hi all,

I am trying to use Ghost Multicast Server (8.3.0.1331)
on a Windows 2003 server SP1 with 2 nics:

one conected to the enterprise's network (DHCP),

the other one to a local router (fixed IP, 192.168.1.1).

The ideea is to use this server with 3 Com Boot PXE and deploy images
using the switch.

I have also an DHCP server connected to the fixed IP Nic.

Using Multicast with just one client works fine, but with 2 clients it
stops responding.

The ghost Cast server sees all clients, actually sends out a couple of
megs, but then "hangs", and there is nothing more going to the clients.
The clients receive some of the informations, but after this nothing
more seems to pass.

Anyone else has seen this behaviour?
Any ideea everyone?

Thanks,
Lucian