Dear All,
  I have a linux machin running on a Debian 2.6 kernel , with an Atheros Card installed in it.. I need to change its Tx Power. However I am not able to do it. Its an urgent requirement. Any help would be highly appreciated.

node1-1:~# uname -a
Linux node1-1.sb1.orbit-lab.org 2.4.26 #2 Tue Nov 30 23:13:47 EST 2004 i686 GNU/Linux

node1-1:~# iwconfig ath0
ath0      IEEE 802.11g   ESSID:"" 
          Mode:Managed  Frequency:2.422 GHz  Access Point: 00:00:00:00:00:00  
          Bit Rate=36 Mb/s   Tx-Power=off   Sensitivity=0/3 
          Retry:off   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality:0  Signal level:0  Noise level:0
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

node1-1:~# iwconfig ath0 txpower auto
node1-1:~# iwconfig ath0 txpower on
node1-1:~# iwconfig ath0 txpower 10
node1-1:~# iwconfig ath0          
ath0      IEEE 802.11g  ESSID:"" 
          Mode:Managed  Frequency: 2.422 GHz  Access Point: 00:00:00:00:00:00  
          Bit Rate=36 Mb/s   Tx-Power=off   Sensitivity=0/3 
          Retry:off   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality:0  Signal level:0  Noise level:0
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0


Could someone help me out ?

Thanks in anticipation
Regards
Sankar