Mark - I took your suggestion and upgraded to 4.03 (both C4 and the render node). Now it is not working at all. There is no indication the render node is doing anything. When I try to abort the render from the main computer, I get an error message saying it cannot establish a connection with port 5060 (I only have the main and 1 render node set to port 5020).

I have tried several different combinations of port numbers, always making sure the numbers on the main computer and the render node matched and the render node was set to the first value. Nothing helped, though when I change the port numbers, the error message I get when I abort the render changes to reference whatever the last port number is.

Any ideas?