Asus 900 EEEPC can't connect to access point

[Matteo Riva <muradin@gmail.com>]

I have installed a Lenny system on an Asus EEEPC 900 and I have some
problems with the wireless connection.  It works with a Linksys router,
but I have to manually configure IP and DNS, it doesn't seem to talk to
the DHCP.

With another router (TP-Link TL-WR541G) I get this error:

  Connection failed: Could not contact the wireless access point

Configuring the net manually (as per the other router) isn't a problem,
but with this no change I make to the configuration seems to have any
effect.

Any help very much appreciated, thanks