I am having almost the exact same issue, but I can't seem to figure out how to access it when it is in configuration mode.  My router has a default gateway of 192.168.1.1, and if I try and set a static IP to 192.168.168.100, it does not work.  Rather I can only set up 192.168.1.100.  Either am completely disconnected if I use the 192.168.168.100 static IP, OR if I set it to something else, like 192.168.1.100, I can't access the miner at 192.168.168.168.  Well, I can't seem to access the miner regardless.

Any suggestions on what I can do?