when I use WEP on hostap, DHCP doesn't work

[sukwoo song]

hostap works well on my linux with DHCP.

However, If I setup WEP, clients can't get IP by DHCP.

[  /etc/dhcpd.conf  ]
DHCPDARGS=ath0;
ddns-update-style interim;
option domain-name-servers 168.126.63.2;

subnet 192.168.1.0 netmask 255.255.255.0 {
option routers 192.168.1.1;
option subnet-mask 255.255.255.0;
range 192.168.1.10 192.168.1.50;
}
service dhcpd start [OK]


- BEFORE using WEP

My client can get IP from my llinux and internet.


-AFTER using WEP

 [  hostapd.conf  ]
wep_default_key=0
wep_key0=123456789a

$hostapd hostapd.conf

My client can't get IP from my linux



what's wrong???
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