Thanks for idea ! Finally I solved the problem ! Btw - probably there is a typo in example above. I should change "t" to "w", to make it works. I mean: WAS: $ldap=Net::LDAP->net($host) or die "Can't connect to LDAP server: $@"; NOW: $ldap=Net::LDAP->new($host) or die "Can't connect to LDAP server: $@"; Any way - thanks a lot ! :)