Have a second pair of eyes check your router settings.
http://www.portforward.com/english/r..._IP_Camera.htm
I would go to ipchicken.com to see my outside WAN address, and I would use this address to log in remotely. If this works then it is trouble shooting the host address next.
Are you using the host address at the same location as the DVR? You will not be able to use a WAN address at the same location of the DVR. You will have to move to another location and remote in.
These notes probably seem redundant to you, but I posted them for others who come here from search engines.
We would suggest to others to start a new thread.
Let us know how it works!
Take care