Integration

I use the OID java API (http://download.oracle.com/docs/cd/B15904_01/manage.1012/b14083/oracle/ldap/util/User.html#authenticateUser%28javax.naming.directory.DirContext,%20int,%20java.lang.Object%29) to authenticate users. I have three instances of the OID server, dev, test and prod. Against the DEV instance, this works well. But against the test and prod instance I get this error when I try to authenticate a user: "[LDAP: error code 16 - No Such Attribute]". The name of the attribute that apperently is missing is not printed. As far as I can se, the scheme in all OID instances are the same (they should of cource). The user object in OID also has the same object classes. Does anyone have a clue for where to locate the problem? The error message is not so explaining.