[squid-users] configure error in ldap_group

hi!

what did i wrong on my configure
squid 2.5.STABLE1

./configure --prefix=/usr/local/squid
 --enable-arp-acl
 --enable-snmp
 --enable-err-languages="German English"
 --enable-default-err-language=German
 --enable-auth="basic ntlm"
 --enable-basic-auth-helpers="SMB multi-domain-NTLM winbind MSNT"
 --enable-ntlm-auth-helpers="SMB winbind no_check"
 --enable-external-acl-helpers="winbind_group"
 --enable-ntlm-fail-open


messages after configure... and working on "make"
- snip -
Making all in external_acl
make[2]: Entering directory `/install/squid-2.5.STABLE1/helpers/external_acl'
Making all in ldap_group
make[3]: Entering directory `/install/squid-2.5.STABLE1/helpers/external_acl/ldap_group'
source='squid_ldap_group.c' object='squid_ldap_group.o' libtool=no \
depfile='.deps/squid_ldap_group.Po' tmpdepfile='.deps/squid_ldap_group.TPo' \
depmode=gcc /bin/sh ../../../cfgaux/depcomp \
gcc -DHAVE_CONFIG_H -I. -I. -I../../../include -g -Wall -c `test -f squid_ldap_group.c || echo './'`squid_ldap_group.c
squid_ldap_group.c: In function `searchLDAP':
squid_ldap_group.c:465: warning: implicit declaration of function `ldap_build_filter'
gcc -g -Wall -g -o squid_ldap_group squid_ldap_group.o -lldap -llber
squid_ldap_group.o: In function `searchLDAP':
/install/squid-2.5.STABLE1/helpers/external_acl/ldap_group/squid_ldap_group.c:465: undefined reference to `ldap_build_filter'
collect2: ld returned 1 exit status
make[3]: *** [squid_ldap_group] Error 1
make[3]: Leaving directory `/install/squid-2.5.STABLE1/helpers/external_acl/ldap_group'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/install/squid-2.5.STABLE1/helpers/external_acl'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/install/squid-2.5.STABLE1/helpers'
make: *** [all-recursive] Error 1
- snip -


as i see that the make wants something with "ld returned 1"
i include this mail my output "ldconfig -v"

i have SuSE linux 7.3 kernel 2.4.something :o)


thank you!
Andreas