NDIS - Change 802.11 channel

Hi,

In my program, I can change the SSID, Network mode (Ad-Hoc /
Infrastructure) and BSSID. But when I try to change the channel (in
Ad-Hoc mode) it doesn't want to work. I created the Ad-Hoc network in my
program, so I'm the only one node but the card keeps the channel from
the previsou channel when it was connected. I want to be able to set the
channel (1->13)

I tried to change the channel mode through OID_802_11_CONFIGURATION...
but nothing happens.

Did someone have an idea for me?

Thanks,
Marco