Import From an LDAP Server Failed to Model Table

In OpenLDAP Server have a Group 'HR' and with 3 Users named hr1, hr2, hr3 correspondingly, more details refer to blog [1].

As attached 5 pics we import LDAP Service to Source Model:

• In ldap-ds-3.png directory tree on the left, each time if click one of items the others are gone as ldap-ds-4.png, also in sometimes directory tree can not form correctly.
• In ldap-ds-5.png validation failed cause can not further process the wizard.

[1] http://ksoong.org/ldap-java/