The 819 would have to be in AP mode for this to work, same with the netgear router. It is impossible to pass DHCP through 2 (or even 1) NAT devices (routers). They both have to be bridging.
To access the dlink router, the IP should work. Can you Ping the IP address? Also, if in AP mode, enter http://dlinkap.local. in your browser and see if it connects to the web UI.
What browser are you using?