I tried with wpa supplicant, and was unsuccessful:

network={
      ssid="dedasys"
      key_mgmt=WPA-PSK
      proto=WPA
      psk="not my real super secret phrase"
}

Here are the results with -d enabled:

root@fortrock:~# wpa_supplicant -d -c ./wpa_supplicant.conf -ieth1
Initializing interface 'eth1' conf './wpa_supplicant.conf' driver 'default' ctrl_interface 'N/A' bridge 'N/A'
Configuration file './wpa_supplicant.conf' -> '/root/./wpa_supplicant.conf'
Reading configuration file '/root/./wpa_supplicant.conf'
ctrl_interface='/var/run/wpa_supplicant'
Priority group 0
   id=0 ssid='dedasys'
Initializing interface (2) 'eth1'
Interface eth1 set UP - waiting a second for the driver to complete initialization
SIOCGIWRANGE: WE(compiled)=22 WE(source)=21 enc_capa=0xf
  capabilities: key_mgmt 0xf enc 0xf flags 0x0
WEXT: Operstate: linkmode=1, operstate=5
Own MAC address: 00:1b:77:79:b8:2b
wpa_driver_wext_set_wpa
wpa_driver_wext_set_key: alg=0 key_idx=0 set_tx=0 seq_len=0 key_len=0
wpa_driver_wext_set_key: alg=0 key_idx=1 set_tx=0 seq_len=0 key_len=0
wpa_driver_wext_set_key: alg=0 key_idx=2 set_tx=0 seq_len=0 key_len=0
wpa_driver_wext_set_key: alg=0 key_idx=3 set_tx=0 seq_len=0 key_len=0
wpa_driver_wext_set_countermeasures
wpa_driver_wext_set_drop_unencrypted
RSN: flushing PMKID list in the driver
Setting scan request: 0 sec 100000 usec
EAPOL: SUPP_PAE entering state DISCONNECTED
EAPOL: KEY_RX entering state NO_KEY_RECEIVE
EAPOL: SUPP_BE entering state INITIALIZE
EAP: EAP entering state DISABLED
Added interface eth1
Ignore event for foreign ifindex 3
RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'eth1' added
RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'eth1' added
Wireless event: cmd=0x8b06 len=8
State: DISCONNECTED -> SCANNING
Starting AP scan (broadcast SSID)
Trying to get current scan results first without requesting a new scan to speed up initial association
ioctl[SIOCGIWSCAN]: Resource temporarily unavailable
Failed to get scan results
Failed to get scan results - try scanning again
Setting scan request: 0 sec 0 usec
Starting AP scan (broadcast SSID)
Scan requested (ret=0) - scan timeout 5 seconds
EAPOL: disable timer tick
RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'eth1' added
Wireless event: cmd=0x8b19 len=8
Received 1569 bytes of scan results (6 BSSes)
CTRL-EVENT-SCAN-RESULTS 
Selecting BSS from priority group 0
Try to find WPA-enabled AP
0: 00:19:e0:f8:55:38 ssid='I-Link' wpa_ie_len=26 rsn_ie_len=24 caps=0x11
   skip - SSID mismatch
1: 00:17:9a:f1:06:35 ssid='dedasys' wpa_ie_len=22 rsn_ie_len=0 caps=0x11
   selected based on WPA IE
   selected WPA AP 00:17:9a:f1:06:35 ssid='dedasys'
Try to find non-WPA AP
Trying to associate with 00:17:9a:f1:06:35 (SSID='dedasys' freq=2437 MHz)
Cancelling scan request
WPA: clearing own WPA/RSN IE
Automatic auth_alg selection: 0x1
WPA: using IEEE 802.11i/D3.0
WPA: Selected cipher suites: group 8 pairwise 8 key_mgmt 2 proto 1
WPA: set AP WPA IE - hexdump(len=24): dd 16 00 50 f2 01 01 00 00 50 f2 02 01 00 00 50 f2 02 01 00 00 50 f2 02
WPA: clearing AP RSN IE
WPA: using GTK TKIP
WPA: using PTK TKIP
WPA: using KEY_MGMT WPA-PSK
WPA: not using MGMT group cipher
WPA: Set own WPA IE default - hexdump(len=24): dd 16 00 50 f2 01 01 00 00 50 f2 02 01 00 00 50 f2 02 01 00 00 50 f2 02
No keys have been configured - skip key clearing
wpa_driver_wext_set_drop_unencrypted
State: SCANNING -> ASSOCIATING
wpa_driver_wext_set_operstate: operstate 0->0 (DORMANT)
WEXT: Operstate: linkmode=-1, operstate=5
wpa_driver_wext_associate
wpa_driver_wext_set_psk
Setting authentication timeout: 10 sec 0 usec
EAPOL: External notification - EAP success=0
EAPOL: External notification - EAP fail=0
EAPOL: External notification - portControl=Auto
RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'eth1' added
Wireless event: cmd=0x8b06 len=8
RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'eth1' added
Wireless event: cmd=0x8b04 len=12
RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'eth1' added
Wireless event: cmd=0x8c02 len=165
Association info event
req_ies - hexdump(len=49): 00 07 64 65 64 61 73 79 73 01 08 02 04 0b 16 0c 12 18 24 32 04 30 48 60 6c dd 16 00 50 f2 01 01 00 00 50 f2 02 01 00 00 50 f2 02 01 00 00 50 f2 02
resp_ies - hexdump(len=16): 01 04 82 84 8b 96 32 08 0c 12 18 24 30 48 60 6c
WPA: set own WPA/RSN IE - hexdump(len=24): dd 16 00 50 f2 01 01 00 00 50 f2 02 01 00 00 50 f2 02 01 00 00 50 f2 02
RTM_NEWLINK: operstate=0 ifi_flags=0x11003 ([UP][LOWER_UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'eth1' added
Wireless event: cmd=0x8b15 len=20
Wireless event: new AP: 00:17:9a:f1:06:35
State: ASSOCIATING -> ASSOCIATED
wpa_driver_wext_set_operstate: operstate 0->0 (DORMANT)
WEXT: Operstate: linkmode=-1, operstate=5
Associated to a new BSS: BSSID=00:17:9a:f1:06:35
No keys have been configured - skip key clearing
Associated with 00:17:9a:f1:06:35
WPA: Association event - clear replay counter
WPA: Clear old PTK
EAPOL: External notification - portEnabled=0
EAPOL: External notification - portValid=0
EAPOL: External notification - EAP success=0
EAPOL: External notification - portEnabled=1
EAPOL: SUPP_PAE entering state CONNECTING
EAPOL: enable timer tick
EAPOL: SUPP_BE entering state IDLE
Setting authentication timeout: 10 sec 0 usec
Cancelling scan request
RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'eth1' added
Wireless event: cmd=0x8b15 len=20
Wireless event: new AP: 00:00:00:00:00:00
Setting scan request: 0 sec 100000 usec
Added BSSID 00:17:9a:f1:06:35 into blacklist