Netgear MR814v2 and MA401 question

Hello all. I searched but found nothing on this particular problem.
Here's my setup:

Windows XP home
Alcatel Speed Touch Home ethernet modem
Netgear MR814v2 wireless router
Netgear MA401 wireless pc card

Here's my problem: Modem works great. Router shows an Internet
connection (but with an amber light). Wireless card claims excellent
connectivity to router. When ethernet cord between router and laptop
NIC is connected, surfing is grand. When I remove the ethernet cord to
surf wirelessly, all Internet connectivity ceases, even thought he
wireless card still claims perfect linkage to the router.

Can anyone help me?