Connect to wlan 802.11a 5MHz

I run OpenSUSE11.1 on Dell Latitude D830 with wlan: Intel 3945ABG

We are setting up wlan over 802.11a but i can’t see this on my OpenSUSE. Other laptops with WinXP do!

So i was thinking there is some missing firmware to support 802.11a

How do i fix this?

It sould say 5GHz! 802.11a runs on 5GHz but 11bg runs on 2,4GHz