MN-700 Lost LAN

Have an MN-700 used as a router. Dell with XP PRO
connected with CAT 5, Toshiba Laptop XP PRO wireless G.
One morning on startup, both computers would go on the
internet, but when seen on the MN700 device listing,
icons would look like a drive. When logged into the MS
Broadband networking utility, all looks OK. But when you
open My Network Places, nothing is listed and neither
computer can see the other, and the laptop cannot use the
printers connected to the Dell. I can PING each computer
from the other, but cannot 'see' either computer when
using command line to the computer name. Computer names
are different, workgroup name is identical. Have
uninstalled/reinstalled MS Broadband networking, still
the same. Any Suggestions??