macaddr_acl doesn't seem to work

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Hi guys,

I'm trying to set up my debian box (Linux voyage, kernel 2.6.20, hostapd 0.5.10)
as a wifi ap using an Atheros AR5006X 802.11abg card with the madwifi 0.9.4 driver.

I have activated Access Control List for MAC Addresses using macaddr_acl=1 and specifing
the authorized MACs in accept_mac_file.

Here is my hostapd configuration :

interface=ath0
bridge=br0
driver=madwifi

logger_syslog=-1
logger_syslog_level=1
logger_stdout=-1
logger_stdout_level=2

debug=2
dump_file=/tmp/hostapd.dump
ctrl_interface=/var/run/hostapd
ctrl_interface_group=0
ssid=myssid
hw_mode=g
macaddr_acl=1
accept_mac_file=/etc/hostapd/hostapd.accept
deny_mac_file=/etc/hostapd/hostapd.deny
auth_algs=1
eap_server=0
wpa=3

wpa_passphrase=mypassphrase
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP

But i can connect from client who MAC address is not listed in accept_mac_file file.

What's wrong ?

Any suggestion are welcome.

Thanks in advance.

Hamza