Is there a trick to getting the antminer to hold on to a reassigned static ip?

I go into the Network > Interfaces > Wan > and change the settings to an address on 192.168.1.x that is unassigned on my network, but when I hit save and apply it just hangs.  I've tried a few different times now, waiting 2 min, 5 min, 10 min, and after plugging the cable back into the router, the miner hasn't been reassigned to the new address.  I used the advance ip scanner utility and it still shows the same default address at 192.168.2.xx, which I can now not connect to either.  After shorting the pins to do a hard reset, I can re-connect again on 192.168.2.99.

Any ideas?