IPC-B52IR-Z12E refuses to accept an ip change from the default 192.168.1.108 - is it possible that the camera is defective? The Dahua app will do everything (initialize, etc) except successfully change the IP. (The camera has been reset multiple times, as well as having the power removed for 10+ seconds, then reconnected.) We've tried setting the Microsoft laptop's IP to 192.168.1.1 (our network is 192.168.50.1). Help? Do I need to return it?