LDAP connection issue during JTS setup

Hi Team,
I am doing distributed setup for IBM ELM 7.1.0 application on windows servers. Using JAS (SSO planned for future), as of now have configured JAS with LDAP. Have did required configuration in JAS ldapregistry.xml and appconfig.xml file to include ldap for JAS. After all this, have started with jts setup and added JAS URL with oidc/endpoint/jazzop with Admin user id and password, this connection is successful.
  In next page, where JTS and LDAP connection has to be set, have added same LDAP parameters that has worked for JAS but it shows error as : 

The LDAP connection was not successful. To use LDAP for the user registry, you must resolve the connection issues before you continue.ID CRJAZ2922E :Unable to validate the user information ldap://ldaphostname:3268
 
In jts.log, I can see error as :  [259039d8.21] CRJAZ2149W An error occurred while validating the LDAP configuration.
  From this JTS server where I am running setup, I can ping LDAP host successfully, even TCPTest is successful. I can even connect to same ldap server over Apache directory studio.  
So does anyone know what could be the issue here? How to fix this?
Thanks.
Regards, Sneha