Unable to access a computer in workgroup

Please help.

I am unable to view shared files in a computer in the
same workgroup. That computer has XP home edition. I
see the computer in the workgroup. When I click on it, I
get the following message:

\\vaio is not accessible. You might not have permission
to use this network resource. Contact the administrator
of this server to find out if you have access permissions.
THe network path was not found.

Any ideas?

Another symptom is that when I view computers in a
workgroup, I would sometimes see all of them and
sometimes just two and sometimes just one. I have three
computers that are networked.

Thanks for your help.

\\vaio is not accessible. You might not have permission
to use this network resource. Contact the administrator
of this server to find out if you have access permissions.
THe network path was not found.

1. Try setting a WEP.
2. What OS are you using for all three computers?
3. Where are you computers located? (Distance and room
objects.)



Another symptom is that when I view computers in a
workgroup, I would sometimes see all of them and
sometimes just two and sometimes just one. I have three
>computers that are networked.

Make sure all three computers are on.