Have you allowed demigod through any software firewalls you have?

Same problem here. Ran wireshark on both machines. Client is sending UDP broadcast from port 1075 to 15000. Server is responding directly (15000 to 1075). Packets back and forth continuously. Nothing comes up on the screen.

The only possible problem is that the server response is fragmented.  But then you'd already be handling that, since at 1800 bytes, it's bigger than a standard Ethernet frame.

Nice text-based protocol btw, all the server details are there in the clear.  Easy to debug I'd imagine.

Will look into setting port ranges manually.

Hey there, I had a similar problem. I'm using Vista, and it hates me. I don't use any securtiy, but every now and then Windows Firewall decides that it's on (It's always off though). Even with the firewall being off, try to add Demigod to your firewall exceptions, and just generally make sure to give it a good talking to so that it knows to stay off, for real this time.

More info now.  One machine is Vista64, the other XP32.  The XP machine is not responding to packets, whereas the Vista one is.  I conclude that something is wrong on the XP machine.  The XP machine seems to be listening on all the right ports (netstat -a reports 15000 and 6073 in the listen state). 

We're currently uninstalling the firewall, since disabling it doesn't seem to work (it doesn't report that it's blocking anything, but who knows).

Same problem here and I've come to the same solution. Comodo firewall running, on both the Vista and XP (SP3) machine.

Completely uninstalling the firewall works, disabling it does not.