continua a non funzionare la wi-fi

qui riporto tutti i passagi che ho fatto... ovviamente prima avevo disattivato con sudo rmmod b43 il modulo b43 e poi ho disattivato con sudo modprobe -r bcm43xx...
a parte che non mi ha accettato la chiave WPA perchè credo che il metodo che ho usato io è per le WEP, comunque l'ho inserita dopo a livello grafico, il problema è che non mi fa ne la scansione delle reti e non si connette... ma non capisco perchè, eppure con iwconfig la scheda la vede.
Io questa scheda l'avevo fatta funzionare su Kubuntu 7 e avevo messo un post su questo forum, però se non ricordo male ci ero riuscito semplicemente usando ndiswrapper.
sudo apt-get install ndiswrapper-common
sudo apt-get install ndiswrapper-utils-1.9
sudo ndiswrapper -i bcmwl5.infmarco@marco-desktop:~/Scrivania/asus$ sudo ndiswrapper -l bcmwl5 : driver installed
device (14E4:4318) present (alternate driver: ssb)
sudo dmesg[ 35.944422] saa7134 ALSA driver for DMA sound loaded
[ 35.944458] saa7130[0]/alsa: saa7130[0] at 0xff6fa400 irq 16 registered as card -2
[ 36.175151] b43-phy0: Broadcom 4318 WLAN found
[ 36.269649] phy0: Selected rate control algorithm 'simple'
[ 38.071737] input: b43-phy0 as /devices/virtual/input/input6
[ 38.177453] b43-phy0 ERROR: Firmware file "b43/ucode5.fw" not found or load failed.
[ 38.177462] b43-phy0 ERROR: You must go to
http://linuxwireless.org/en/users/Drivers/b43#devicefirmware and download the correct firmware (version 4).
[ 38.361126] input: b43-phy0 as /devices/virtual/input/input7
[ 38.423107] b43-phy0 ERROR: Firmware file "b43/ucode5.fw" not found or load failed.
[ 38.423115] b43-phy0 ERROR: You must go to
http://linuxwireless.org/en/users/Drivers/b43#devicefirmware and download the correct firmware (version 4).
[ 38.512100] NET: Registered protocol family 17
[ 45.534371] Bluetooth: L2CAP ver 2.9
[ 45.534376] Bluetooth: L2CAP socket layer initialized
[ 45.575392] Bluetooth: RFCOMM socket layer initialized
[ 45.575414] Bluetooth: RFCOMM TTY layer initialized
[ 45.575416] Bluetooth: RFCOMM ver 1.8
[ 47.484595] eth0: Media Link Off
[ 47.627826] [drm] Initialized drm 1.1.0 20060810
[ 65.206651] NET: Registered protocol family 10
[ 65.207686] lo: Disabled Privacy Extensions
[ 65.208910] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 71.073599] input: b43-phy0 as /devices/virtual/input/input11
[ 71.146895] b43-phy0 ERROR: Firmware file "b43/ucode5.fw" not found or load failed.
[ 71.146905] b43-phy0 ERROR: You must go to
http://linuxwireless.org/en/users/Drivers/b43#devicefirmware and download the correct firmware (version 4).
[ 249.166665] UDF-fs: No VRS found
[ 249.176089] ISO 9660 Extensions: Microsoft Joliet Level 3
[ 249.282760] ISO 9660 Extensions: RRIP_1991A
[ 297.852117] UDF-fs: No VRS found
[ 297.863389] ISO 9660 Extensions: Microsoft Joliet Level 3
[ 297.943823] ISO 9660 Extensions: RRIP_1991A
[ 439.555561] input: b43-phy0 as /devices/virtual/input/input12
[ 439.626874] b43-phy0 ERROR: Firmware file "b43/ucode5.fw" not found or load failed.
[ 439.626884] b43-phy0 ERROR: You must go to
http://linuxwireless.org/en/users/Drivers/b43#devicefirmware and download the correct firmware (version 4).
[ 545.894162] ndiswrapper version 1.52 loaded (smp=yes, preempt=no)
[ 545.918300] usbcore: registered new interface driver ndiswrapper
marco@marco-desktop:~/Scrivania/asus$ sudo iwlist wlan0 scan wlan0 Interface doesn't support scanning : Network is down
marco@marco-desktop:~/Scrivania/asus$ iwconfig lo no wireless extensions.
eth0 no wireless extensions.
wmaster0 no wireless extensions.
wlan0 IEEE 802.11g ESSID:""
Mode:Managed Channel:0 Access Point: Not-Associated
Tx-Power=0 dBm
Retry min limit:7 RTS thr:off 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
marco@marco-desktop:~/Scrivania/asus$ sudo ndiswrapper -m module configuration already contains alias directive
marco@marco-desktop:~/Scrivania/asus$ sudo iwconfig wlan0 essid Alice-22222222 marco@marco-desktop:~/Scrivania/asus$ iwconfig wlan0 enc ------------------------ non mi ha accettato la chiaveError for wireless request "Set Encode" (8B2A) :
invalid argument "------------------------".
marco@marco-desktop:~/Scrivania/asus$ sudo dhclient wlan0 Internet Systems Consortium DHCP Client V3.0.6
Copyright 2004-2007 Internet Systems Consortium.
All rights reserved.
For info, please visit
http://www.isc.org/sw/dhcp/ wmaster0: unknown hardware address type 801
SIOCSIFFLAGS: No such file or directory
SIOCSIFFLAGS: No such file or directory
wmaster0: unknown hardware address type 801
Listening on LPF/wlan0/00:18:f3:6a:f5:ab
Sending on LPF/wlan0/00:18:f3:6a:f5:ab
Sending on Socket/fallback
receive_packet failed on wlan0: Network is down
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 7
send_packet: Network is down
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 12
send_packet: Network is down
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 12
send_packet: Network is down
marco@marco-desktop:~/Scrivania/asus$ iwconfig wlan0 wlan0 IEEE 802.11g ESSID:"Alice-22222222"
Mode:Managed Channel:0 Access Point: Not-Associated
Tx-Power=0 dBm
Retry min limit:7 RTS thr:off 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
marco@marco-desktop:~/Scrivania/asus$ iwlist scanning lo Interface doesn't support scanning.
eth0 Interface doesn't support scanning.
wmaster0 Interface doesn't support scanning.
wlan0 No scan results
marco@marco-desktop:~/Scrivania/asus$
marco@marco-desktop:~/Scrivania/asus$
marco@marco-desktop:~$ ping 192.168.1.1 connect: Network is unreachable
marco@marco-desktop:~$ ping www.google.it ping: unknown host
www.google.itmarco@marco-desktop:~$ iwlist scanninglo Interface doesn't support scanning.
eth0 Interface doesn't support scanning.
wmaster0 Interface doesn't support scanning.
wlan0 No scan results
marco@marco-desktop:~$ iwconfiglo no wireless extensions.
eth0 no wireless extensions.
wmaster0 no wireless extensions.
wlan0 IEEE 802.11g ESSID:""
Mode:Managed Channel:0 Access Point: Not-Associated
Tx-Power=0 dBm
Retry min limit:7 RTS thr:off 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