processInstanceByteArray column always null in processInstanceInfo table when using MS SQL 2005 DB . the documentation said its NotNull and what i understand it keep the state of the processinstance in this byte array and because its always null when i retrive the session by loading it , when calling getallprocessinstance it always get me null . is that beacuse the byte array always null, and if soo why is this happened?please any one have a clue :( :((