setValue on a combobox with JPAContainer as datasource

Hello all,

I was in trouble setting value in a combobox with a JPAContainer datasource.
What I do, if I resume :

myCombo.setContainerDataSource(myJpaContainer);
myCombo.setItemCaptionPropertyId(“jpaLabelColumn”);
myCombo.setItemCaptionMode(ItemCaptionMode.PROPERTY);

… later I try to set a default value :
myCombo.setValue(myJpaEntity);

myJpaEntity exists in container. Value is correctly set ( I can get it back from combo with a getValue() ).
But no text is shown in the combo.

Then I found an answer from Jonatan Kronqvist on the forum (https://vaadin.com/forum/#!/thread/2729098).
So i added :
myCombo.setConverter(new SingleSelectConverter(myCombo));

I tried but I still get the same result…

Can anybody give me a hand or an advise ?

Regards
Banania