Problems with LDAP and NetBeans Collaboration-Plugin

I want to use the NetBeans “Collaboration Login” Plug-In with my Openfire-Server. If I use a HSQL-Database there no problems. I can connect to it and chatting with other. Now I run the Openfire-Server with a mySQL-DB and use LDAP. For Miranda it works fine (name, password,path to Server)but with NetBeans and the same connection-infos I cant connect to the Server.

Any idea what I have to write?