Executing hostapd getting ioctl error!

[Victor Yeo]

Good'day,

I am using hostapd-0.3.7 with madwifi HEAD branch. I can compile hostapd but i got errors when executing it.
Here's the error i am getting. 

ioctl[IEEE80211_IOCTL_SETPARAM]: Invalid argumentThis operation failed: Why?

Many thanks.

victor
My error log:--------------
# hostapd -d hostapd.conf
Configuration file: hostapd.conf
madwifi_set_iface_flags: dev_up=0
Using interface ath0 with hwaddr 00:0b:6b:34:88:d0 and
ssid 'MyWireless'
madwifi_set_ieee8021x: enabled=1
madwifi_configure_wpa: group key cipher=1
madwifi_configure_wpa: pairwise key ciphers=0x2
madwifi_configure_wpa: key management algorithms=0x2
madwifi_configure_wpa: rsn capabilities=0x0
madwifi_configure_wpa: enable WPA= 0x1
ioctl[IEEE80211_IOCTL_SETPARAM]: Invalid argument
ath0: DRIVER Error enabling WPA/802.1x!
IEEE 802.1X initialization failed.
rmdir[ctrl_interface]: No such file or directory
madwifi_set_privacy: enabled=0
madwifi_set_ieee8021x: enabled=0
madwifi_set_iface_flags: dev_up=0
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