Not able to update using apt

[Daniel Andersson <list@daniel-gr-andersson.com>]

Hi

I just installed Debian Squeeze on a Eee PC. The installer downloaded 
all the packages during the install but when I want to install more 
packages at the prompt I only get:

Could not resolve 'ftp.sunet.se'


I've only selected laptop and webserver with tasksel during installation.

I'm able to ping ftp.sunet.se and the mirror is working on my other 
laptop. /etc/resolv.conf is updated correctly, I get an IP from my 
router. It does not help getting a new lease using dhclient.


Any ideas?


Best regards
Daniel Andersson