Airport Express Ethernet Not Accessible via Wireless WRT120N

I have an Airport Express and two wireless routers. The Airport Express is connected to Router 1 via Ethernet. Router 2 is connected to Router 1 via Ethernet. Since I like to know which Wireless Router I'm connected to, Router 1 & 2 use different SSIDs. Router 1 is the DHCP server (DHCP turned off on Router 2). All security settings are turned OFF.

I cann connect via wireless to Router 1 and Router 2 via the seperate SSIDs and have Internet connectivity (Router 1 is connected the the Internet) and print to a wireless printer connecter to the Router 1 wireless network.

Now here is the strange thing. I can see the Airport Express only if I connect to the Router 2 wireless network. I cannot see it if I connect to the Router 1 wireless network, yet the Airport Express is connected via Ethernet to ROUTER 1 !!

So for some reason, the LinkSys WRT120N Wireless Router won't route the Airport Express to a wireless client, but it will route it to an Ethernet client which is what any client connected to Router 2 wirelesslessly is seen as. When connected to router 1 wirelessly I can ping the IP of the Airport but something is preventing it from working with iTunes/iPhone/Airport Utility. It is bizarre because these are all devices connected to the same LAN.