So I'm trying to experiment with IVS. I've set it up in the camera. However, I can't seem to configure anything in my nvr5216. On the generals tab I do NOT have that enable IVS checkbox at the bottom like andy shows earlier in this thread. I have 7/21/2016 firmware. Others have same issue, yet I don't find any fix for that. Also, when I go into IVS event in nvr, select a channel, I get that warning about configuration, but nothing else I do in that screen actually saves. I pick a channel, click enable, click record, etc, click apply, ok, etc, then come back and it's all gone. Any ideas?