I had problems similar, and here's one thing I noticed:

On one of my vista machines, in the Properties for the network connection,
the Client for Microsoft Networks was blank. When I selected Windows Locator,
the sharing seemed to work now.

Hope this might help.

Dave

"TheMadscanner" wrote:

> Hi - I have a PC (Dell) with Vista Home, connected via ethernet to a router.
> I also have a laptop (Acer) connected by wireless to the same router. Both
> machines connect to the internet without any problems. I have placed both
> machines in the same workgroup, but am having trouble accessing either.
>
> From the Dell, I can ping the Acer (by IP and by name), but from the Acer I
> cannot ping the Dell at all. The Dell's Vista Network map shows the Acer as
> a device on the network.
>
> If I try to view the Dell from the Acer, I get the standard "Dell cannot be
> accessed. You may not have permission " error. I have done a few searches on
> the internet, but the plethora of possible solutions is somewhat confusing,
> so am looking for someone to point me in the right direction.
>
> TIA.