Wi-fi button on laptop acer 4220 don't work

[Fadeev]

All work... but I can't turn on my wi-fi on acer 4220...
A install .nfo file from windows drivers using ndiswrapper..

No reaction to the button wi-fi

What to do?

[Fadeev]

iwconfig return:
iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

irda0 no wireless extensions.

wmaster0 no wireless extensions.

wlan0 IEEE 802.11g ESSID:"default"
Mode:Managed Channel:0 Access Point: Not-Associated
Tx-Power=0 dBm
Retry min limit:7 RTS thrff Fragment thr=2346 B
Link Quality:0 Signal level:0 Noise level:0
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0

[Fadeev]

Help please!