Windows 2003 SBS Access from Outside my LAN

I have a Windows 2003 SBS set up. It is behind a Linksys WRT54G router. The SBS has a static IP of 192.168.2.150. My sever name is SRV0001. I have a static IP from my ISP that is configured on my router. I port forward all necessary ports to my server. I have a DNS name for my static IP address.

Problem: I can access my server inside my LAN tough IE using either:

http://srv001 or
http://dnsname.net
Http://static ip

but I cannot get to this server outside my LAN.

What am I doing wrong?