I have 2, fresh from China, Dahua DH-IPC-HDW4421C cameras. I find them in the Dahua config tool w/o issue. But I can not modify their IP address. They show up in the tool as 192.168.1.108. I try to change them to my network (10.0.0.x) and all I get is "failed to modify ip". I ordered 2 of...