how to solve invalid structural object class chain

I try to a entry like this: cn = .. ,dc=..,dc=..,dc=..,dc=.. cn = .. objectClass: person objectClass: inetOrgPerson objectClass: organizatinoalRole objectClass: device objectClass: pkiUser roleOccupant: ... employeeNumber : .. userCertificate;binary :: BASE64 Encode icSerilNumber: .. tel: ... fax: ... telex: ..

log reports " invalid structural object class chain in organizatinoalRole/Person or organizatinoalRole/inetOrgPerson etc" I try many combination about the order of person ,inetOrgPerson and organizatinoalRole, and the same error was reported.

thanks for help gtalk:freeespeech@gmail.com