To access the box from outside the firewall you need to use your public IP address of the modem as your destination. None of those IP addresses are the public IP which is assigned to your router.
In the second rule, you most likely do not want to change the Redirect Port to 81 from the original 6036. If you are trying to connect to the DVR on port 6036 that rule will always change the port to 81 instead.
Thanks for your reply sliedl. Appreciated it.
Okay, so as to what is stated above, even if I try to view it via our Public IP Address, it will also say "Connect Failed!".
Oopps, Originally, the second rule redirect port is 6036, that was just a typograhical error and I'm sorry for that.
Name: DVR Port Forward 6036
NAT: <localhost> (Host)
Redirect: DVR IP - 192.168.1.250
Redirect Port: 6036
You'll have to do troubleshooting using tcpdumps and audits now to determine where the connection is failing. The rules look correct.