@frank-0 I see the essential M552, I do not know about the password M551 call as I don't use a password to connect to the network.
I am afraid I am the limits of my knowledge here. I would go and see if the 6HC shows up in the router IP listings and go from there. There are really endless possibilities starting with a defective network cable. Have you hooked the cable to another device and checked for traffic?
