Hey zap46,
Login to the D-link router and click on Status, then
Log and make sure you see DHCP discover, DHCP lease and
an IP, Authentication Success/Failure, PC connected.
If all is well there than make sure all the Local Area connections
are set to optain there IP address automatically. Right click a
local area connection, properties, Internet Protocol, then select
properties and Obtain IP address automatically.
If that's good you didn't state if the computers are connecting
wireless or wired to the router. If wired log in the router
click on Tools, Cable Test and see if it shows the Link status as
connected for the cables pluged into the router. Next go to
Home, DHCP and make sure your DHCP server is enabled and
the pool of addresses is large enough.
Now do an ipconfig /renew from command prompt and see
if you get an IP from the router. Make sure ICF is turned off
on all the Windows XP machines so that sharing across the LAN
will be easier. Refer to this Microsoft Article for sharing printers
on a LAN.
http://support.microsoft.com/default.aspx?kbid=814005
Good Luck.
