Clé wifi neufbox wpa debian

proliant:/etc/network# cat /etc/network/interfaces 
auto lo 
iface lo inet loopback 

#Wifi configuration 
auto wlan0 
iface wlan0 inet dhcp 
wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf 

...

proliant:/etc/network# cat /etc/wpa_supplicant/wpa_supplicant.conf 
ctrl_interface=/var/run/wpa_supplicant 
eapol_version=1 
ap_scan=1 
fast_reauth=1 

network=( 
        ssid="nom_rézo" 
        scan_ssid=1 
        proto=WPA 
        key_mgmt=WPA-PSK 
        psk=clé_rézo
        priority=5 
)  

...

proliant:/etc/network# ifup wlan0 
wpa_supplicant: /sbin/wpa_supplicant daemon failed to start 
run-parts: /etc/network/if-pre-up.d/wpasupplicant exited with return code 1 
Internet Systems Consortium DHCP Client V3.1.1 
Copyright 2004-2008 Internet Systems Consortium. 
All rights reserved. 
For info, please visit http://www.isc.org/sw/dhcp/ 

wmaster0: unknown hardware address type 801 
wmaster0: unknown hardware address type 801 
Listening on LPF/wlan0/00:24:01:12:34:24 
Sending on   LPF/wlan0/00:24:01:12:34:24 
Sending on   Socket/fallback 
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 4 
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 4 
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 9 
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 16 
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 12 
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 16 
No DHCPOFFERS received. 
No working leases in persistent database - sleeping.