wireless in warty

[Don W. Jenkins]

I have Warty installed alongside two other Linux distros on my desktop 
so I can compare.  One thing perplexes me: I have a Proxim Orinoco PCI 
wireless card with the atheros chip, which Ubuntu finds and installs the 
modules for and then adds as ath0 in the networking tool.  The wireless 
link meter on my gnome toolbar shows the link to be on and running 
around 70-80%, just as it shows in Mepis after I activate ath0.  The 
card appears to be connected to the router and receiving the signal, but 
when I open Firefox or try to use apt-get nothing is happening.  When I 
look at the networking tool in Ubuntu, ath0 shows up as green but not 
enabled, and when I try to enable it, it only stays checked for a moment 
and then unchecks.  If I run sudo ifdown and then sudo ifup or sudo 
dhclient, it probes port for several times and then goes to sleep when 
it doesn't receive a response.  When I activate the card in Mepis, it 
receives an address right away.  So, I guess for some reason in Ubuntu 
the link is there, but the card is not being assigned an address by the 
router? Similarly, in SuSE, the card just starts working when I activate 
it with Yast.  Any notions what would make it appear to be connected and 
receiving a signal but not doing any work? 

Thanks,
Don J.