Cannot call webserver from inside lan.

Hello, I have a webserver running CentOS 5.4 with Virtualmin and I have 3 websites on this server. I recently placed the server into a DMZ. I have 2 routers and a switch. I have my Cisco routers and switch properly configured.

Problem: I can call my server from outside the DMZ. The webpages come up in the browser. The problem I have is when my Desktop is inside the Lan, I cannot call my server.

can you call it by IP?

I can call one of my websites by IP of . The webserver is named based.