11.0 Kde4 wlan problem with wpa

hi,

i have a problem with my wlan on my ibm t40 notebook.

i have a cisco wlan card and the latest updates.

when i want to install my wlan connection i can only use wep, not wpa.

when i want to use wpa i can’t get an ip address from my dhcp.
when i use wep i can get an ip adress…

is there any workaround or known problem with wpa psk / wpa2 psk on kde4 ?

thx

so long

rainer