Error for wireless request "Set Frequency" (8B04)

[titanas]

I have my wireless enterasys card in managed mode and i load its interface eth1 during booting with a static ip. When i try to change the channel to 11 or frequency to 2.462GHz i get the following error.

[root@monaco ~]# iwconfig eth1 freq 2.462G
Error for wireless request "Set Frequency" (8B04) :
SET failed on device eth1 ; Device or resource busy

[root@monaco ~]# iwconfig eth1 channel 11
Error for wireless request "Set Frequency" (8B04) :
SET failed on device eth1 ; Device or resource busy

Has anyone seen this before?What is happening?

(2.6.16-1.2080_FC5)

[trickster]

You might need to bring the interface down in order to do that.

 ifconfig eth1 down
iwconfig eth1 freq 2.462G
iwconfig eth1 channel 11
ifconfig eth1 up

[titanas]

Trickster thanks for your post.

It doesnt work even if i take it down:
ifconfig eth1 down
ifconfig eth1 channel 11
Error for wireless request "Set Frequency" (8B04) :
SET failed on device eth1 ; Device or resource busy