Can't access AvTech791 DVR from the Inernet

[legro]

Hi, i do have a similar issue with my DVR and streaming.

My dvr's static ip is 192.168.2.15 and is uses port 80. Port forwarding is set on my belkin router. I can access my dvr from my home, and i can enter into my dvr's settings panet, however i can not see any stream, it only shows Quicktime logo and 'negotiating' on quicktime's bottom bar. I tried to switch firewall off on my router but it did not help.

Quicktime works fine over my internal ip address. (when i am at work and type 192.168.2.15)

I use AvTech791 DVR (CPCAM CPD540 / KPC672 / MDR672).

Any thoughts what could that be and how can i fix it?

Thanks