SL-6000L, OZ 3.5.4
Does not work
iwconfig wlan0 channel 6

root@tosa:~# ifup wlan0
Using /lib/modules/2.4.18-rmk7-pxa3-embedix/wlan-ng/p80211.o
Using /lib/modules/2.4.18-rmk7-pxa3-embedix/wlan-ng/prism2_usb.o
ok.
udhcpc (v0.9.9-pre) started
Sending discover...
Sending discover...
Sending discover...
No lease, forking to background.
root@tosa:~# iwconfig wlan0 channel 6
Error for wireless request "Set Frequency" (8B04) :
SET failed on device wlan0 ; Operation not supported.

What's wrong?