bcm43xx, second connection to network

[Eugen Dedu <Eugen.Dedu@pu-pm.univ-fcomte.fr>]

Hi,

I own a PB with an Airport Extreme card.  When I connect the first time 
(for ex. ifconfig eth1 up ; iwconfig eth1 essid ZZZ ; dhclient) to a 
wi-fi network, the Airport Extreme works ok.  But when I go to another 
network (go home for ex.), I execute ifconfig eth1 up ; iwconfig eth1 
essid XXX key YYY and it associates successfully (as shown by iwconfig). 
 However, dhclient does not work (no DHCPACK).

In brief, dhclient does not work for me when my AE has already 
associated to another network.  How to make it work to a second network too?

Friendly,
--
Eugen Dedu