I have a TD Vision DVR and can watch the video stream connected to DVR by android application XMEye.I want to watch video directly by using ip address of DVR in every where . I can see the video in home network by using ip address 192.168.1.108 inside internet explorer . I set the Port forwarding in my Zyxel modem from Port 80 to Port 80 . But when I put the modem external IP inside the browser , the page for login appears and I enter the user and pass but there is a prompt that can not find the device. What should I do to solve this problem?