There are to many variables. You may have to find a friend who is computer savvy, and have them take a look.
If the DVR is on the same gateway then you should be able to go in to CMD and ping the DVR ip address. If no then trouble shoot the wiring. If yes then you should have video on your local LAN.
If the DVR uses active x then you may have to change a setting on your computer, (or computers).
You need to go to internet options > security tab > custom level
You need to change to prompt Download unsigned active X controls
If the DVR is using a port number other than port 80 then you need to do port forward on your router.
Based on your router you may have to make some changes. Allow for ping, and allow for unknown internet connections.
http://scorpiontheater.com/videonetw...ithavtech.aspx