Network not starting properly, but running fine after restart

Hi guys,
I'm riding Ubuntu 7.10 and having troubles with wifi + wpa (tkip) +
centrino.
I can do everything quite easily but for some reason, when I boot up I
cannot connect: from my own "diagnostics" I can clearly see that
wpa_supplicant is running fine; this anyway doesn't seems to be enough to
get my connection up: in order to have connection I need to restart the
network:
#> /etc/init.d/networking restart

After this, I get everything running fine.
Follows "/etc/network/interfaces":

auto lo
iface lo inet loopback


iface eth1 inet static
address 192.168.0.3
netmask 255.255.255.0
gateway 192.168.0.1
wpa-driver wext
wpa-ssid NETGEAR
wpa-psk my_password
wpa-proto WPA
wpa-pairwise TKIP
wpa-group TKIP
wpa-key-mgmt WPA-PSK

auto eth1

Do you see anything wrong with it.. ?
Thanks in advance

--
InuY4sha