[SOLVED] Network Connection Failed WIFI/WPA2

[Chakky]

Code:

auto lo

iface lo inet loopback
iface eth0 inet dhcp

allow-hotplug wlan0
iface wlan0 inet dhcp

wpa-ssid "Luft"
wpa-psk "XXX"
wireless-power off

XXX is only a short part of my password i think this is the problem

//edit: I tryed to change but:

Code:

Permission denied.
Error code: 3
Error message from server: Permission denied
Request code: 3