If it's getting to the "No connection" screen, you've already done all the hard work since we know the networking is up and able to run NFS. At that point, slimrio will be repeatedly sending out UDP broadcasts to port 3483; I can't imagine why you wouldn't see them unless perhaps there's some funny switch or firewall in the way.

Were you connecting to port 5000 from the same machine that served it the NFS image? If not, give that a try. Can you ping it from there?

What are you using to give it a DHCP address? Could it have been given the same address as another host on the network?