Squid Cache: Version 2.5.STABLE12
MS Active Directory OS: Server 2003 SP 2

following runs successfully
ldapsearch -LLL -b "dc=local,dc=test,dc=com" -D "cn=userid,ou=IT,dc=local,dc=test,dc=com" -w user_password -h 192.168.1.3 -x

but following gives error

squid_ldap_auth -b "dc=local,dc=test,dc=com" -D "cn=admin,ou=IT,dc=local,dc=test,dc=com" -w "admin_passwors" -h 192.168.1.3 -p 3268
userid password
ERR Success

squid_ldap_auth -b "dc=local,dc=test,dc=com" -D "cn=admin,ou=IT,dc=local,dc=test,dc=com" -w admin_password -f "uid=%s" -h 192.168.1.3 -p 3268
userid password
ERR Success

squid_ldap_auth -b "dc=local,dc=test,dc=com" -f "uid=%s" -h 192.168.1.3 -p 3268
userid password
squid_ldap_auth: WARNING, LDAP search error 'Operations error'
ERR Success

please help