Explain exactly what you mean by "it doesn't boot out. It just hangs up."
In the Rockwell BOOTP/DHCP Utility, check the Network settings to be sure you have an appropriate Subnet Mask and Default Gateway.
If you don't need the Gateway, leave it blank, because the Utility will not allow a Default Gateway and an IP Address that aren't on the same Subnet.
What should occur when you create an MAC/IP entry in the Utility is that you'll see the BOOTP request occur once more, then see the Utility send an IP address to the controller.
If you continue to see BOOTP requests from the controller, then there's something wrong with the firewall or another issue with your computer's networking.
One important troubleshooting step you can take is to remove all of the MACID entries from the BOOTP/DHCP Utility's table and watch the BOOTP traffic go by. If you see only one BOOTP request and then no others, it indicates that there's another BOOTP server on your network from which the controller is getting its address. Isolate the controller and your PC from any enterprise network or router and you should get the BOOTP/DHCP Utility to take over that role.
