Sony PCWA-C150 wireless LAN card: which driver?

Hi --

I'm trying to get the wireless LAN card that came with my PCG-GRX616MP Vaio
working.

cardctl ident gives:
  product info: "Sony Corporation", "PCWA-C150", "Version 01.01", ""
  manfid: 0x0156, 0x0002
  function: 6 (network)

I'm using Gentoo linux and have followed the usual instructions. I've tried
all the drivers from the pcmcia-cs package and get this message:
Jul  8 16:36:05 [kernel] Linux PCMCIA Card Services 3.2.4
Jul  8 16:36:05 [kernel] Intel ISA/PCI/CardBus PCIC probe:
Jul  8 16:36:05 [cardmgr] watching 2 sockets
Jul  8 16:36:05 [cardmgr] starting, version is 3.2.4
Jul  8 16:36:06 [cardmgr] socket 0: Intersil PRISM2 11 Mbps Wireless Adapter
Jul  8 16:36:06 [kernel] cs: memory probe 0xa0000000-0xa0ffffff: clean.
Jul  8 16:36:06 [cardmgr] executing: 'modprobe orinoco_cs'
Jul  8 16:36:06 [cardmgr] bind 'orinoco_cs' to socket 0 failed: Operation not permitted

lsmod gives:
Module                  Size  Used by    Not tainted
orinoco_cs              4756   0  (unused)
orinoco                38412   0  [orinoco_cs]
hermes                  6596   0  [orinoco_cs orinoco]
ds                      7432   2  [orinoco_cs]
i82365                 41408   2 
pcmcia_core            44384   0  [orinoco_cs ds i82365]

I get "Operation not permitted" with all the drivers I've tried. Needless to
say, the card does not appear as wlan0 or eth1 in ifconfig. Googling this
error message finds lots of questions but no answers :-(

Has anyone got this card working under Linux? If so, which driver did you
use?

Thanks,

Tom