wireless trouble - Buffalo WLI-CB-G54

[toyfactory]

I recently installed Hoary on my Sony Vaio Z600.  I actually intended to
check out the live CD first, but by mistake I used the install disc
instead!  It seems to work reasonably well though, Gnome is a little
sluggish (it's a 700MHz PIII, 192MB RAM) so I might try an alternative
window manager sometime.

One problem I have is the wireless network.  I have a PCMCIA Buffalo
WLI-CB-G54 that doesn't want to come on.

ndiswrapper -l reports:

bcmwl5a driver present, hardware present

iwconfig reports:

wlan0 IEEE 802.11g ESSID:off/any
Mode:Managed Frequency:2.462 GHz Access Point: 00:00:00:00:00:00
Bit Rate:54 Mb/s Tx-Power:25 dBm
RTS thr:2347 B Fragment thr:2346 B
Power Management:off
Link Quality:100/100 Signal level:-10 dBm Noise level:-256 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0

iwlist wlan0 scan reports:

wlan0 No scan results

My AP is configured to broadcast SSID so the fact that scan doesn't pick
anything up suggests the adaptor isn't working.  I think the fact that
the power light isn't on is probably a big give-away that it's not
working!

Currently I have to modprobe -i ndiswrapper manually, later I ought to
find how to get it all working automatically.  Incidentally, it works in
Windows without a hitch.

Any ideas?

Nick