How to add new object class to openldap Shema

Hi,

I am trying to add a new object to openldap directory schema through java
programming,but i am getting an error like:
------------------------------------------------------------------------------
"javax.naming.directory.InvalidAttributeValueException: [LDAP: error code
21 - objectClasses: value #0 invalid per syntax]; remaining name ''".
------------------------------------------------------------------------------

So please rectify it and send me the appropriate solution as early as
possible

Thank You.