Hi: I tried "jdbc:ldap://myorg.com:389/o=myorg.com?SEARCH_SCOPE:=subTreeScope" it doesn't work and I also tried some other baseDn and the problem is still there. I can connect to the server through other ldap tools like netscpae.ldap classes. if I use "jdbc:ldap://myorg.com:389/?SEARCH_SCOPE:=subTreeScope" to connect it seems there is no problem.