Can't locate object method "disconnect" via package "Net::LDAP"

[Tyagi, Praveen (GE, Corporate, consultant)]

Hello,
        I am trying to disconnect the ldap connection handle in a perl
program. Here is the sequence that I am following:
connect and bind
unbind
$ldap->disconnect();

I get the error Can't locate object method "disconnect" via package
"Net::LDAP"

How should I use disconnect? 

What is the difference between an unbind and disconnect? Unbind seems to
work just fine. I am just curious.

Thanks,

Praveen