trouble getting Wired Equivalent Privacy (WEP) working

[http://dummy.us.eu.org/robert (Robert)]

I am unable to get my WEP to work on my LinkSys Etherfast Wireless AP +
Cable/DSL Router (BEFW11S4) with my Gigafast 720-AEX PCMCIA card.  I am able
to connect without WEP.  After visiting the LinkSys web site, a Knowledge Base
question dealt with a Orinoco card.  It suggested that I should be able to set
the passphrase to "77777" on the LinkSys access point and then set the
keys on the PCMCIA card to 37 - 37 - 37 - 37 - 37 and have it work.
Unfortunately, it doesn't.  I also tried changing one of the keys in the
WEP screen (Key 1, to be specific) to 3737373737, but it still did not work.

Any ideas on how to get the WEP working?

Thanks.