Hello,

I am experiencing troubles connecting to a WPA protected AP with wpa_supplicant with my external card Alfa AWUS036H.

card is detected and works fine with other tools.
Code:
root@kali:~# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0c:29:49:80:0c  
          inet addr:192.168.11.131  Bcast:192.168.11.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe49:800c/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:7697 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6475 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:4841516 (4.6 MiB)  TX bytes:1014321 (990.5 KiB)
          Interrupt:19 Base address:0x2024 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:52 errors:0 dropped:0 overruns:0 frame:0
          TX packets:52 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:3744 (3.6 KiB)  TX bytes:3744 (3.6 KiB)

wlan0     Link encap:Ethernet  HWaddr 00:c0:ca:54:ae:df  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
Code:
root@kali:~# wpa_supplicant -Dwext -iwlan0 -c /etc/wpa-supp.conf
ioctl[SIOCSIWENCODEEXT]: Invalid argument
ioctl[SIOCSIWENCODEEXT]: Invalid argument
ioctl[SIOCSIWSCAN]: Device or resource busy
wlan0: Failed to initiate AP scan
ioctl[SIOCSIWSCAN]: Device or resource busy
wlan0: Failed to initiate AP scan
ioctl[SIOCSIWSCAN]: Device or resource busy
wlan0: Failed to initiate AP scan
ioctl[SIOCSIWSCAN]: Device or resource busy
wlan0: Failed to initiate AP scan
^Cwlan0: CTRL-EVENT-TERMINATING - signal 2 received
wpa supplicant configuration file

Code:
network={
	bssid=00:21:63:0E:29:2E	
	ssid="some"
	key_mgmt=WPA-PSK
	pairwise=TKIP
	proto=WPA
	group=TKIP
	psk="a1s2d3f4Q5"
}
any suggestions or similar experience? thank you