TomatoUSB

Currently have a d-link 655 stock firmware running wireless to most of my house

I have a new asus rt-n16 that I installed tomato on and have setup openvpn in client mode from the privateinternetaccess guide online. It works great, but I can't access the internal LAN from this router. (the lan is from the d-link)

There is a modem/router doing dhcp as well from the isp. That has dhcp turned on, wireless off. It assigns ip downstream to my DIR-655(even the wireless clients!) no problem. However if I let it assign to my asus rt-n16 clients, openvpn stops working. (apparently doesn't like working from the wan set as lan)

How can I get these guys communicating with each other. I want to run a PLEX media server from behind the d-link router and then access it from the roku boxes connected to the VPN asus router?

It must be this way, I can't run plex from the asus side.

Thank you for your help.