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wpa_supplicant problem on beagleboard

hi all

i m trying to interface ralink 3370 chipset based wifi dongle to beagleboard.

when i start the wpa_supplicant command , i m getting the error below

root@beagleboard:~# wpa_supplicant -Dwext -iwlan0 -c /etc/wpa_supplicant.conf


ioctl[SIOCGIWSCAN]: Resource temporarily unavailable
ioctl[SIOCSIWSCAN]: Device or resource busy
Failed to initiate AP scan.
Trying to associate with 68:bc:0c:cb:bf:f0 (SSID='KIRAN' freq=2412 MHz)
[ 240.577178] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
Associated with 68:bc:0c:cb:bf:f0
[ 243.768493] cfg80211: Calling CRDA for country: IN
WPA: 4-Way Handshake failed - pre-shared key may be incorrect
CTRL-EVENT-DISCONNECTED - Disconnect event - remove keys
Trying to associate with 68:bc:0c:cb:bf:f0 (SSID='KIRAN" freq=2412 MHz)
Associated with 68:bc:0c:cb:bf:f0
[ 248.573181] cfg80211: Calling CRDA to update world regulatory domain
WPA: 4-Way Handshake failed - pre-shared key may be incorrect
CTRL-EVENT-DISCONNECTED - Disconnect event - remove keys

my wpa_supplicant is as below

network={
ssid="KIRAN"
psk="kiran1234*/89"
key_mgmt=WPA-PSK
}

kindly help