using mementoservice I get: Parsing string to type (....) is not supported

[JohanDoornenbal]

When using memento service I get: 

        
                Parsing string to type org.estatio.dom.budget.BudgetKeyTable is 
not supported


        How can I support this? I tried by adding toString() method and title() 
to no avail.

        

        grtz Johan