Yes, they are on different segments. 
I am using IPcop for the firewall. 
I have 10.0.0.1 255.255.255.0 on the lan (green) 
Static ip's from isp on wan (red)
and 10.1.0.1 255.255.255.0 on the DMZ (orange)
The Lan gives out IP's from 10.0.0.5-10.0.0.99
The dmz has one machine ( the smeserver) at 10.1.0.2
The static IP address for that box is forwarded to the internal IP of the smeserver on ports 80 and 443. 
How do I do that when I can't access the server-manager ? 
Do I add the whole lan ? 
I am accessing it from a box getting a dhcp address on the lan.