ugh 802.11B confusion

Hi,
I'm using an Linksys 802.11B wireless router connected to a DSL modem on my
wired computer. I have another machine connected to a Linksys USB wireless
box. This unit can "see" my wireless WEP network, but can not connect.
I've tried including and not including the IP address (from my DHCP client
table) and DNS servers as listed in the router configuration screens - but
nothing. In all cases the "network" is viewable but not connectable. I'm
not seeing any other networks in the area so the neighborhood is clean. I
also have antenna booster connected to the router.

Any suggestions?

Thanks