new errors compiling hostapd

[pelusa vali]

well first of all thanks to Dimitris who suggest installation of libssl-dev, 
but now when i try to compile hostapd i get these error messages:

undefined reference to iapp new station
undefined reference to  iapp deinit
undefined reference to  iapp init

My .config file is:

CONFIG_DRIVER_MADWIFI=y
CFLAGS += -I/usr/src/madwifi-ng
CONFIG_RSN_PREAUTH=y
CONFIG_EAP=y
CONFIG_EAP_MD5=y
CONFIG_EAP_TLS=y
CONFIG_EAP_MSCHAPV2=y
CONFIG_EAP_PEAP=y
CONFIG_EAP_GTC=y
CONFIG_EAP_TTLS=y
CONFIG_EAP_SIM=y
CONFIG_PKCS12=y
CONFIG_RADIUS_SERVER=y

and my hostapd.conf file is:

driver=madwifi
logger_syslog=-1
logger_syslog_level=0
logger_stdout=-1
logger_stdout_level=0
debug=3
dump_file=/tmp/hostapd.dump
ctrl_interface=/var/run/hostapd
ctrl_interface_group=0
ssid=mired
macaddr_acl=0
auth_algs=0
ieee8021x=1
eap_message=hello
eapol_key_index_workaround=0
eap_reauth_period=3600
check_crl=1
own_ip_addr=127.0.0.1
auth_server_addr=127.0.0.1
auth_server_port=1812
auth_server_shared_secret=pw4radius
wpa=2
wpa_key_mgmt=WPA-PSK WPA-EAP
wpa_pairwise=TKIP CCMP
wpa_strict_rekey=1
rsn_preauth=1
rsn_preauth_interfaces=ath0

so, why i get this error if i'm not setting iapp?? thanks for your help.
PD. i use debian sarge kernel 2.6.13, wireless tools v27, madwifi-ng, 
hostapd last stable release.

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