Hi Anurag,
Thanks for the clarification. I get what you mean...
On seeing the screenshot of the log, you definitely have an issue with the user id/password you are using.
Please try the following:
In Browse LDAP:
Please select Credentials: as User + Password
as enter the User and Password as highlighted:
In my case the user id is test (in your case it might be superuser or whatever you have set)
Ensure that the user id you are using above is setup and password is maintained under User groups -> Authenticated:
Let me know how you go.
Cheers!
KV