problem in Wireless Extension

[Yong Chu Eu Ñî×ÓÓÓ]

i am install hostap driver on my redhat linux 2.4.26, any one can help? i
try on few version kernel of linux

[root at localhost root]# iwconfig wlan0 txpower 150
Warning: Driver for device wlan0 has been compiled with version 16
of Wireless Extension, while this program is using version 15.
Some things may be broken...

Error for wireless request "Set Tx Power" (8B26) :
    SET failed on device wlan0 ; Operation not supported.
[root at localhost root]# iwconfig wlan0 txpower 150
Warning: Driver for device wlan0 has been compiled with version 16
of Wireless Extension, while this program is using version 15.
Some things may be broken...

Error for wireless request "Set Tx Power" (8B26) :
    SET failed on device wlan0 ; Operation not supported.
[root at localhost root]# iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

Warning: Driver for device wifi0 has been compiled with version 16
of Wireless Extension, while this program is using version 15.
Some things may be broken...

wifi0     IEEE 802.11b  ESSID:"homenetwork" 
Nickname:"localhost.localdomain"
          Mode:Master  Frequency:2.412GHz  Access Point: 00:04:75:88:7F:9C
          Bit Rate=11Mb/s   Sensitivity=1/0
          Retry min limit:8   RTS thr:off   Fragment thr:off
          Encryption key: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:2  Invalid misc:230   Missed beacon:0

wlan0     IEEE 802.11b  ESSID:"homenetwork" 
Nickname:"localhost.localdomain"
          Mode:Master  Frequency:2.412GHz  Access Point: 00:04:75:88:7F:9C
          Bit Rate=11Mb/s   Sensitivity=1/0
          Retry min limit:8   RTS thr:off   Fragment thr:off
          Encryption key: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:2  Invalid misc:230   Missed beacon:0




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