MUB com sistema Ubuntu 11.04 sem acesso a Wireless

[douglas_santos]

segue abaixo as informaçoes...

root@Douglas-Ubuntu:/home/douglas# lshw -C network
  *-network               
       description: Ethernet interface
       product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: eth0
       version: 01
       serial: 00:e0:4c:80:13:49
       size: 100Mbit/s
       capacity: 100Mbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm vpd msi pciexpress bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full ip=192.168.1.2 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
       resources: irq:42 ioport:2000(size=256) memory:f4000000-f4000fff memory:f0000000-f001ffff
  *-network
       description: Wireless interface
       physical id: 4
       logical name: twifiu0
       serial: 00:21:c5:11:65:4f
       capabilities: ethernet physical wireless
       configuration: broadcast=yes multicast=yes wireless=802.11 g
root@Douglas-Ubuntu:/home/douglas# iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

twifiu0   802.11 g  ESSID:"QUALITY"  Nickname:""
          NWID:off/any  Mode:Managed  Frequency=2.412 GHz 
          Access Point: 1C:BD:B9:CA:BA:79   Bit Rate:54 Mb/s   
          Retry:on   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=0/100 
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

root@Douglas-Ubuntu:/home/douglas#

acesso via cabo.. okk... e a wireless... e localiza as rede de acessoo.. mas n conecta...