password reset on CPCam 8 channel mpeg4 network dvr

My employer has a CPCam 8 channel mpeg4 dvr and at one point it was working, then after someone did maintenance by adding a new camera, was 3 now has 4, we can no longer login with admin/admin.

I can ping 192.168.1.110 and i get a reply so i know I'm talking to the DVR. I can user I.E. and connect to https://192.168.1.110:80 and get prompted for the userid and password, but I get rejected.

Is there a way to reset the factory setting?

I've tried admin/admin, admin/0000, admin,1111, admin/1, admin/11111111, Administrator/admin, Administrator/1111, all combinations.

Another thing I find odd is that when I hit the power button it won't power off. So if someone set the secondary security, then no one here knows how to get it unset.

I called the tech support hotline and I don't get called back, so I'm really hoping you can tell me how to flash this back to factory defaults.