You have to understand that this is an inbound connection, someone on the outside of the network is connecting on the network to see your DVR. The connection comes from the internet, so your ISP router needs to know where to send it too, which is your inside router. And then your router needs to know also where to send a connection to a given port, your DVR's IP.
Thanks for the help...I finally figure it out and it worked on these settings
I disabled my local router's (where my DVR is connected) port forwarding and Port range forwarding... then on the security tab - I disabled the "filter anonymous request"option (the one that hides ports on the network).
I configured my DVR ports on the port forwarding options on my ISP's router and restarted it to apply changes. I checked my new IP address since my Home connection is dynamic and asked my brother to remote access my DVR and it worked.....I guess its the firewall thing on my router that restricts access on my DVR ports
I even tried it through android mobile, remote PC and remote client software and its working fine.
Now my next goal is to try using a DDNS to compensate with my ever changing I.P - I'll post another subject on that as soon as I have my DynDNS subscription...
Thanks dude!