Problem in LDAP authentication

Greetings All,

I m trying to authenticate the user for my web page using the ldap
server.i m able to get the info using user name. but i m not able to
authenticate the password. here is the below code i m using.even if i
give the wrong password it access the ldap server.i m not able to
authenticate the user with their password. i tried in all ways.

use Net::LDAP;
$ldap = Net::LDAP->new("ldap.abc.com");
$mesg = $ldap->bind("$userid",userPassword =>"$pw");

use Net::LDAP;
$ldap = Net::LDAP->new("ldap.abc.com");
$ldap->bind("ou=active,ou=employees,ou=people,o=abc.com",
password=>"$pw");

i m using Sun OS and Perl 5. can anyone tell me where i m going
wrong...

thanks,
Prakash