iwn does not associates

hi all,

since a month the wireless card of the E6400 Dell does not associate
with the access point.
it used to work fine, before.
the config is exactly the same:
iwn5150fw + iwn + wpa_supplicant => tkip.

starting wpa_supplicant associates a few seconds and reverts to no carrier.

	 here is what i get:
sysctl dev.iwn.0.debug=1

iwn_notif_intr: scanning channel 7 status 1

		ifconfig wlan0
		...
	status: no carrier
	ssid MyDomain channel 7 (2442 MHz 11g)
	regdomain ETSI country FR authmode OPEN privacy OFF txpower 30
	bmiss 10 scanvalid 60 bgscan bgscanintvl 300 bgscanidle 250
	roam:rssi 7 roam:rate 5 protmode CTS wme bintval 0


thanks in advance for your help.

Best regards

raoul
rmgls_at_free.fr