nooobeee

Hello, I'm not having luck connecting my Zmodo wireless IP cameras ZP-IBI15-W to my N8-Mini NVR. I can see the cameras on MeShare and Zsight apps so I know they are on my network. I can also ping the cams and the NVR on the network from a PC. Also checked the IP addresses of the cameras and the NVR connecting to the same default gateway. Checked the subnet mask and made sure that they are visible to each other. Yet when the NVR searches for the cameras, no result. Are these devices incompatible or where can I begin troubleshooting this?