Hi Fran,
I took a quick look at that adapter's manual. ftp://downloads.netgear.com/files/WNCE2001/Documentation/UM/WNCE2001_UM_24Sep10.pdf
If you haven't re-done the settings on the adapter the most likely culprit is that it's looking for the wrong WiFi signal. The FiOS router's signal name ( called ESSID or SSID) and password ( called WEP-Key) would be different than your old equipment. You can find the WiFi information on a sticker on the router and you would just follow the directions in the manual for the adapter on how to change the settings.
Lee_vz
Verizon Support
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