Can't access Internet from ME computer only.

Hi,

I have a wireless network. I can access the Internet
from my laptop (which runs XP) and through my worst
computer (running Windows 98). I can't access it, as of
this morning, from my Windows ME computer.

The Rogers help guy says that the settings are all
correct, and that the router seems to be working, but
that the machine is not resolving Internet names.

He suggested I do a ping test on the laptop and than on
the ME desktop to see is this is the problem. I have no
idea what is talking about. Can someone walk me through
this?

J Lo