Question : Installing home network problem with XP

I just bought a new computer with winXP. I'm trying to connect on my labtpop
with  or without a router and I'm not able.
I ran many times the wizard, I installed on my labtop the program that the
wizard created.
There is 2 connections on the netwoks connections and I don't know witch one
use or there is no difference.
The name of the connections are:
1394 Connection Connected, Firewall 1394 Net Adapter
OR
Local Area Connection NVIDIA nForce Networking Controller

The Workgroup is the same of the both computer.

Here is the error message that I have from my desktop:
Echange  is not accessible. You might not have permission to use this
network ressource. Contact the administrator of this server to find out if
you have access permissions. The lists of this server for this workgroupis
not currently available.

The desktop is connected on Internet and I'm able to connect with my laptop
through my labtop.

Help I don't know what to do.

Answer : Installing home network problem with XP

PAQed with points refunded (250)

Computer101
EE Admin