Wifi sous mandriva... Comment faire???

Bonjour à tous !

Voici mon problème:

J'ai installé ma clé USB wifi avec ndiswrapper. C'est une sweek LC100060 basée sur un chipset RALINK RT2500... Donc, ca c'est fait.
Il me dit qu'il la trouve, la clé clignote et tout, donc voila.

Le problème, c'est que je n'arrive pas à me connecter au réseau wifi de chez moi !! Je ne sais pas comment faire !

Voici les infos recueillies par quelques commandes:

ifconfig
wlan0     Lien encap:Ethernet  HWaddr 00:02:44:AC:74:3D
          adr inet6: fe80::202:44ff:feac:743d/64 Scope:Lien
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:1000
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

[root@localhost philippe]# iwconfig wlan0
Warning: Driver for device wlan0 recommend version 18 of Wireless Extension,
but has been compiled with version 17, therefore some driver features
may not be available...

wlan0     IEEE 802.11g  ESSID:"WIFI_JPG"  Nickname:"localhost"
          Mode:Auto  Frequency:2.437 GHz  Access Point: 00:00:00:00:00:00
          Bit Rate=11 Mb/s   Tx-Power:20 dBm   Sensitivity=-121 dBm
          RTS thr=2347 B   Fragment thr=2346 B
          Encryption key:FC18-BCA3-F2A9-9D86-56D6-6434-1A   Security mode:restricted
          Power Management:off
          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

[root@localhost philippe]# iwlist wlan0 scan
Warning: Driver for device wlan0 recommend version 18 of Wireless Extension,
but has been compiled with version 17, therefore some driver features
may not be available...

wlan0     Scan completed :
          Cell 01 - Address: 00:12:17:D4:D8:F5
                    ESSID:"WIFI_JPG"
                    Protocol:IEEE 802.11g
                    Mode:Managed
                    Frequency:2.437 GHz (Channel 6)
                    Quality:0/100  Signal level:-57 dBm  Noise level:-256 dBm
                    Encryption key:on
                    Bit Rate:1 Mb/s
                    Bit Rate:2 Mb/s
                    Bit Rate:5.5 Mb/s
                    Bit Rate:11 Mb/s
                    Bit Rate:18 Mb/s
                    Bit Rate:24 Mb/s
                    Bit Rate:36 Mb/s
                    Bit Rate:54 Mb/s
                    Bit Rate:6 Mb/s
                    Bit Rate:9 Mb/s
                    Bit Rate:12 Mb/s
                    Bit Rate:48 Mb/s
                    Extra:bcn_int=100
                    Extra:atim=0

Merci de me filer un coup de main, parce que je ne sais pas quoi faire! Surtout que quand je tape

ifconfig wlan0 ap adressemac

ca ne change rien !


Merci à tous ceux qui pourront m'aider !! lol