I was determined to get the J11D Ethernet module working in the graphical Designer so after a lot of reading + trial and error….

http://www.tinyclr.com/forum/topic?id=9438
http://www.tinyclr.com/forum/topic?id=9661
http://www.tinyclr.com/forum/topic?id=9816
http://www.tinyclr.com/forum/topic?id=9845
http://www.tinyclr.com/forum/topic?id=10120

Making the J11D work after both reflashing the firmware & reboot was critical