Hello again,
The first suggestion from our team is to review the IP address used.
Do you have a test LDAP server configured on your own personal machine that you are trying to connect to? If not, then the IP address you have used is probably incorrect.
127.0.0.1 is a reserved IP address, synonymous with localhost - meaning it is a "loopback" address that can connect to your machine, but not any others. See:
Even if you DO have an LDAP server running locally for testing, I would start by reviewing the IP and port information, as it may be that you are getting the error message because it cannot find the LDAP server.