Default the unit. I beleive you need to hold in the rest button for a while then let go. If that doesn't work hold in the reset button, unplug power, then plug power back in. Wait several seconds or so then release the reset button. You may have to hold it in for a while, watch the wrench light.
I can't remember the default IP, but I think it is 192.168.200.1
default login:
admin
password