[lwlan-user] Is the powermgmt really 'not supported'?

[=?ks_c_5601-1987?B?seixuL/4?=]

Hi,

I'm using the FC4 and Samsung Magiclan PCMCIA.
And using the 'linux-wlan-ng-0.2.3'.
And the installing was successfully completed.
But the 'powermgmt' command is not working.
I commanded,

wlanctl-ng wlan0 dot11req_powermgmt powermgmtmode=powersave wakeup=true
receivedtims=true

But, the result is

message=dot11req_powermgmt
  powermgmtmode=powersave
  wakeup=true
  receivedtims=true
  resultcode=not_supported

What's wrong?
Is the powermgmt mode really not supported in linux-wlan-ng-0.2.3?
Or is it the problem of Magiclan?
Please Help!

2006.03.23
Antonio Kim