now it works...
i entered the command 20 times, not working.
next day i tried it again and voila.....works....
but everytime i boot the system i have to reenter the command for more power.
is there a way to save this setting ?
i entered at:
iw reg set BO
iwconfig wlan0 txpower 30
but it doesnt work, i have to apply the settings manualy.. ?!..any hint, how to fix that ?