No "My Network Places"

>This refers only to WinXP/2. If there is a better NG I would appreciate
>being told about it.
>
>I have two PCs on a home network. Both PCs use WinXP/2. The desktop PC is
>connected to the router via Ethernet wire. The laptop is connected
>wirelessly. Both PCs can access the Internet. Both can access Outlook
>Express for emails and NGs. Both PCs can ping each other (after
>configuration of the software firewall) and "localhost" etc.
>
>In Start the laptop displays "My Network Places" below "My Computer." In
>Start the desktop does not display "My Network Places." I can access shared
>files on the laptop from the desktop. I cannot access shared files on the
>desktop from the laptop. I set up both PCs alongside each other so that both
>would be configured the same.
>
>How do I obtain "My Network Places" on my desktop?
>
>Thanks in advance,
>
>Peter.
>