Didn't Unplug/Eject PCI card, now it won't work.

I have a Linksys 802.11G wireless notebook adapter (model number
WPC54G). I have been using it successfully on a local WiFi network
for several weeks. The other day, I popped the PCI card out of the
slot without running through the Unplug or Eject Hardware wizard.
Since then, I can't get the card to see the router. I know that the
signal is still there, because I have coworkers who can get a signal.
But I can't get to the router, and the router (apparently) can't see
me.

I'm assuming that this is all because I didn't go through the Unplug
or Eject Hardware wizard like I should have. But how can I fix it?
How can I get this to work with my laptop again?

Any/ all thoughts, comments and suggestions are welcome.

Thanks