LDAP authentication (continue)

When I log in the local machine and use jxplorer to connect LDAP server with the parameter below:

Host: 10.52.1.246                Port: 636

Protocol: LDAP v3

Base DN: O=RGU

Level: SSL+User+Password

User DN: cn=1019157,ou=students,ou=users,ou=comp,ou=destech,o=rgu

Password: the same with login to the Novell Network

I got the message box below:

But after that, when I want to connect again, the jxplorer report "simple bind failed: 10.52.1.246:636".

But when I log in the Novell Network with the same parameter:

The jxplorer report "simple bind failed: 10.52.1.246:636

Interested? Why?