[SyncEvolution] Cannot set calendar properties with SetValue

Hello, I am trying to develop the readItemAsKey() function in my sqlite backend for calendar wusing the setValue() api. The function doesn't return anyy error but there is no field inserted in xml logs. I just have an embty VCAL : <![CDATA[BEGIN:VCALENDAR VERSION:1.0 END:VCALENDAR ]]> Do I miss any config or a something like that? This is what I wrote : if(sysync::LOCERR_OK != getSynthesisAPI()->setValue(aItemKey, "SUMMARY", "My event")){ printf("Cannot set field <SUMMARY> \n"); } The type of field "SUMMARY" is multiligne does it differ from type string? I note that I can easily retreive fields with getValue() api. Thanks in advance for help. Regards.