IIS Problem with Winxp and Windows server 2003

Hi everyone,

I have created an ASP.NET Webservice that runs on IIS Server. It works fine
with Windows 2000.
When tested on XP and 2003 we get an error saying cannot connect to the
server.

1.. It seems that IIS though present on both the systems was not
accessible from remote machines.
2.. That is we are able to access the IIS server using localhost but not
using the IP address or machine name from a remote machine.
Is there some configuration that needs to be done for WinXP and Win2003
Server to make the IIS accessible.

Any help would be appreciated.

with thanks and regards

Vibha