Wireless works on Ubuntu but not on Kubuntu

[Mário Gamito]

Hi,

I have this laptop, a HP Pavillion dv6000.
It has an integrated wireless card, an Intel Pro/Wireless 3945ABG

In Ubuntu it works perfectly.
In Kubuntu, it doesn't connect to my wireless router.

I get this:

"Listening on LPF/eth1/00:19:d2:1a:54:b5
Sending on   LPF/eth1/00:19:d2:1a:54:b5
Sending on   Socket/fallback
DHCPRELEASE on eth1 to 192.168.0.1 port 67
send_packet: Network is unreachable
send_packet: please consult README file regarding broadcast address.
ifup: /sbin/ifconfig eth1 up
iwconfig_set: /sbin/iwconfig eth1 mode managed channel 11 key
restricted s:123de essid mywireless
iwconfig_ap: /sbin/iwconfig eth1 ap 00:04:ED:58:D5:23
ifconfig_dhcp: /sbin/dhclient -q eth1
Trying to get gateway address...
...from /var/lib/dhcp3/dhclient.leases
Gateway address: 192.168.0.1
~ScimInputContextPlugin()
gamito at sincity:~/Desktop$  "

It seems that somehow it reaches the router (Gateway address:
192.168.0.1), but it fails the connection.

Any help would be appreciated.

Warm Regards,
Mário Gamito