wireless problem on Acer aspire one

[s34nn4]

Hi pips... I have AA1 though I was unable to connect to the net using wifi and I see a thread where you need to set it to aes-ccmp on this machine.

This is what it shows when i type $iwconfig




lo no wireless extensions.

eth0 no wireless extensions.

wifi0 no wireless extensions.

ath0 IEEE 802.11g ESSID:"" Nickname:""
Mode:Managed Frequency:2.437 GHz Access Point: Not-Associated
Bit Rate:0 kb/s Tx-Power:16 dBm Sensitivity=1/1
Retry:off RTS thr:off Fragment thr:off
Power Management:off
Link Quality=0/70 Signal level=-96 dBm Noise level=-96 dBm
Rx invalid nwid:3389 Rx invalid crypt:0 Rx invalid frag:0

[s34nn4]

anybody know how to set aes-ccmp in Acer Aspire One?
any help is much appreciated thanks in advance