DNS Resolver not working for me.

[hilltop79]

I am not a pfsense expert. I need to set up a refection for my Blue Iris server. I tried Nat reflection which did work but had some issues with push notifications to the app. I disabled NAT reflection and tried to set up DNS Resolver instead. I went to DNS Resolver. I left everything default and enabled. I then added a Host Override. I set a Host name and a Parent domain of host. I just used myhost.example.com and set the IP address to point to my DVR that is listening on port 80. From Chrome If I put in myhost.example.com I get Bad Request. If I put in the IP on the DVR I can hit the DVR fine. What am I doing wrong? The DVR shows it is using the DNS of the routers IP.