While I might be tempted to try to duplicate your Ethernet problem... I'm not sure I can...
Looking at the coding to configure the connection I see three specific Ethernet shields listed and would wonder if the one that's close to wired boards I have would actually work. I know my Ethernet shield works with demo programs and a Uno or Mega but that's with it's board specific library.
So I'm going to hold off testing but will make one suggestion. There's mention of hard coding the IP of the DCC++ command station. Have you tried both getting the IP from the PC and hard coded?
Jim Albanowski
