I too am having problems. I had to build the computer after a power supply failure. I lost the hard drive so I lost all my settings. Working version was on Windows XP OS MACH3 with NVEM.dll. Ethernet cable plugged directly into the computer from the NVEM IP was 192.168.31.11. That worked!
New computer is Windows 7 32 bit with Mach3 I have tried both NVEM plugins, directly connecting the NVEM to the computer and thru my LAN. I have no luck getting the computer to talk to the NVEM! when I set the IP to 192.168.1.11 or 192.168.31.11 nothing happens! I cycle the power tried everything.
When I plug the NVEM into my home network I cant find it when I go thru the router and look at device address?
Any suggestions, well other than getting a new controller.