Windows 2000 advanced server + router port forwarding

[pk]

I have a Netgear MR814V2 router and windows 2000 advanced
server, when i do port forwarding on my router to port 80,
port scan on the internet revelas port 80 as closed.

is there any setting i need to change on the server to
make to port open on the internet.

regards
pk

 

[pk]

i have tested the same senerio from my network with a
windows 2000 professional machine running iis and it works
on professional but not on advanced server

thanks
pk