Why can't I connect with my Bunker Hill DVR via the internet?

I established a static IP for the DVR, with 4th number set above the range set for the DHCP router, and below 255.
I installed the NetViewer software that came with the DVR and was able to view what the cameras were seeing. Using Internet Explorer I entered the static IP address as a trusted site and set the security level to low. When I tried to "go to" the IP address, the server was not reachable. I realized I still needed to do the Portal Forwarding. Upon doing so, I was able to see what the cameras see in I.E.. Now that I am out of town, I.E. cannot display the page. I tried turning off my Norton firewall and other Norton anti-xxx software, but I.E. still can't reach the IP address. Why did I.E. work while at home, but now does not, and what can I do to resolve the problem ?

I am currently having the same problem , I have ordered instructions that someone is selling for five dollars as soon as I have them I will let you know. until then call your internet provider and make sure they are not blocking the port that you have setup to forward . Mine provider blocks port 80 which is what I had setup . I could view from home in ie because it did not go outside of my network .