Buffalo Tera NAS does not show up

I have a Buffalo Tera NAS attached to my LAN and it shows up in Network Neighborhood on two of my PC's that run Windows XP but do not show up on WIndows 7 Professional. I have rebooted Windows and the NAS no luck. Any ideas?

This website is not affiliated, owned, or endorsed by Microsoft Corporation. It is a member of the Microsoft Partner Program.