Can't register Dahua IPC-HFW5302C w/ Speco N8NSP via ONVIF

I couldn't get any help from Speco when trying to register an ONVIF compliant IP camera on the N8NSP NVR. The IP camera is a Dahua IPC-HFW5302C. Has anybody had any luck with this? Or, is there another website that gets into the firmware side of things where I may be able to revise the firmware to talk to the Speco NVR better?

Thanks!

Did you ever get this fixed? I think I am having the same problem is my N8NSP..