AR2413 802.11bg NIC (rev 01) not working in Ubuntu

I just installed ubuntu 8.10 and i can't make the wireless connection to work. i run some commands and these what i got:
i will appreciate some help to fix this issue.

maria@maria-laptop:~$ sudo iwlist scanning
[sudo] password for maria:
lo Interface doesn't support scanning.

eth0 Interface doesn't support scanning.

wifi0 Interface doesn't support scanning.

ath0 Scan completed :
          Cell 01 - Address: 00:0F:23:E7:3D:80
                    ESSID:""
                    Mode:Master
                    Frequency:2.417 GHz (Channel 2)
                    Quality=31/70 Signal level=-64 dBm Noise level=-95 dBm
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s
                              11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
                              48 Mb/s; 54 Mb/s
                    Extra:bcn_int=100
                    Extra:wme_ie=dd180050f2020101810003a4000027a4000042435e0062322f00
          Cell 02 - Address: 00:22:56:7C:9B:70
                    ESSID:""
                    Mode:Master
                    Frequency:2.462 GHz (Channel 11)
                    Quality=2/70 Signal level=-93 dBm Noise level=-95 dBm
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s
                              11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
                              48 Mb/s; 54 Mb/s
                    Extra:bcn_int=100
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : 802.1x

pan0 Interface doesn't support scanning.

NetworkManager Tool

State: disconnected

- Device: eth0 ----------------------------------------------------------------
  Type: Wired
  Driver: e100
  State: unavailable
  Default: no
  HW Address: 00:0E:7B:00:56:93

  Capabilities:
    Supported: yes
    Carrier Detect: yes
    Speed: 10 Mb/s

  Wired Settings

- Device: ath0 ----------------------------------------------------------------
  Type: 802.11 WiFi
  Driver: ath_pci
  State: disconnected
  Default: no
  HW Address: 00:11:F5:C2:85:5C

  Capabilities:
    Supported: yes

  Wireless Settings
    WEP Encryption: yes
    WPA Encryption: yes
    WPA2 Encryption: yes

  Wireless Access Points

maria@maria-laptop:~$ 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=-93 dBm Noise level=-93 dBm
          Rx invalid nwid:6 Rx invalid crypt:0 Rx invalid frag:0
          Tx excessive retries:0 Invalid misc:0 Missed beacon:0

pan0 no wireless extensions.

maria@maria-laptop:~$ sudo lshw -C network
  *-network:0
       description: Wireless interface
       product: AR2413 802.11bg NIC
       vendor: Atheros Communications Inc.
       physical id: 5
       bus info: pci@0000:01:05.0
       logical name: wifi0
       version: 01
       serial: 00:11:f5:c2:85:5c
       width: 32 bits
       clock: 33MHz
       capabilities: pm bus_master cap_list logical ethernet physical wireless
       configuration: broadcast=yes driver=ath_pci latency=168 maxlatency=28 mingnt=10 module=ath_pci multicast=yes wireless=IEEE 802.11g
  *-network:1
       description: Ethernet interface
       product: 82801DB PRO/100 VE (MOB) Ethernet Controller
       vendor: Intel Corporation
       physical id: 8
       bus info: pci@0000:01:08.0
       logical name: eth0
       version: 83
       serial: 00:0e:7b:00:56:93
       size: 10MB/s
       capacity: 100MB/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=e100 driverversion=3.5.23-k4-NAPI duplex=half firmware=N/A latency=64 link=no maxlatency=56 mingnt=8 module=e100 multicast=yes port=MII speed=10MB/s
  *-network DISABLED
       description: Ethernet interface
       physical id: 2
       logical name: pan0
       serial: b2:fa:a1:d6:bd:03
       capabilities: ethernet physical
       configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A link=yes multicast=yes