Sorting results by column in Hibernate

[s daniel]

I'm having trouble sorting by a specific column. If I sort by participantTypeId it works. But if I sort by sortColumn then I receive an error. But both columns are in the DB and mapped correctly (I think)

public List<CaseRecord> loadCaseParticipantsForCase(final Integer caseId) {
        final DetachedCriteria criteria = DetachedCriteria.forClass(CaseRecord.class);
        criteria.add(Restrictions.eq("caseRecMaster.caseMasterId", caseId));
        criteria.add(Restrictions.eq("activeFlg", CaseRecord.YES));
        criteria.setFetchMode("caseRecMaster", FetchMode.JOIN);
        criteria.setFetchMode("participant", FetchMode.JOIN);
        criteria.setFetchMode("luParticipantType", FetchMode.JOIN);
      //criteria.addOrder(Order.asc("luParticipantType.participantTypeId")); -- uncommenting this line and deleting the line below works
        criteria.addOrder(Order.asc("luParticipantType.sortColumn")); // Using this line errors out
        
        final List<CaseRecord> returnList = findByCriteria(criteria);

        return returnList;
    }    

ERROR - [CmsExceptionHandler.handle:41] Unexpected error caught in the application.
org.springframework.orm.hibernate3.HibernateQueryException: could not resolve property: luParticipantType.sortColumn of: company.dao.domain.CaseRecord; nested exception is org.hibernate.QueryException: could not resolve property: luParticipantType.sortColumn of: company.domain.CaseRecord
Caused by: org.hibernate.QueryException: could not resolve property: luParticipantType.sortColumn of: company.dao.domain.CaseRecord
at org.hibernate.persister.entity.AbstractPropertyMapping.throwPropertyException(AbstractPropertyMapping.java:43) ...

luParticipantType.java

@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "LU_PARTICIPANT_TYPE_SEQ")
@Column(name = "PARTICIPANT_TYPE_ID", unique = false, nullable = false, insertable = true, updatable = true, precision = 38, scale = 0)
	public Integer getParticipantTypeId() {
	return this.participantTypeId;
}

@Column(name = "SORT_COLUMN", unique = false, nullable = false, insertable = true, updatable = true, precision = 3, scale = 0)
     public Integer getSortColumn() {
         return this.sortColumn;
    }