D-Link Air DWL-900AP User Manual page 41

Networking Basics
Computer Identification
If you had previously given your Windows 98 computers names or if you are
using Windows 98, you may need to verify that each computer has a unique
name and common workgroup name.
A. On your Desktop, right-click the icon Network Places and select
Properties from the context menu.
B. Click the Identification tab on the top of the dialog box.