Dell 600 / Wifi / Broadcom / b44

Hi,

I was told that the module b44 is a driver for my Wifi Card (Dell
TrueMobile 1300 WLAN Mini-PCI). I guess its chipset is a Broadcom 4401. So
I have inserted the module b44 using modprobe. This is done without error.
But then iwconfig gives me :

lo no wireless extensions.

eth0 no wireless extensions.

sit0 no wireless extensions.

So then what do I do? Should I have added

lspci returns:

02:03.0 Network controller: Broadcom Corporation BCM94306 802.11g (rev 02)
Subsystem: Dell Computer Corporation TrueMobile 1300 WLAN Mini-PCI Card
Flags: bus master, fast devsel, latency 32, IRQ 7
Memory at fafee000 (32-bit, non-prefetchable)
Capabilities: [40] Power Management version 2


Thanks,

David.