Accessing server using WAN IP from inside LAN

I'm having trouble accessing my web (or any server) using my WAN IP from within my LAN. I get the router administration page whenever I make the attempt. I have port forwarding set up, and I can access it from the outside. Here is my configuration: I have a Linksys WCG200 as my main router. The Linux server running Apache is located behing another router, a Linksys WRT54G (purpose for this is wireless range and extra hub for cables), which has DMZ enabled. The WCG200 operates on subnet 255.255.254.0. The WRT54G operates on subnet 255.255.255.0. I cannot change the subnets to match each other, but I'm not sure if that matters or not.

most firewalls will not do redirects nor will routers with this enabled (its a security feature), a redirect is getting traffic on an interface and sending it back out the same interface which is what you are trying to do. use the internal address if internal not its public NAT address. set up your internal DNS to resolve to the internal address or use host file for name resolution internaly.