The SELECT and the EDIT functions work well in my App, however INSERT fails with the following message:

BusinessLayerException
 An error occurred while saving an the data to the server.
DataLayerSavingException
 Cannot insert the value NULL into column 'id_saison', table 'EKZ7.dbo.Saison'; column does not allow nulls. INSERT fails.
The statement has been terminated.
SqlException
 Cannot insert the value NULL into column 'id_saison', table 'EKZ7.dbo.Saison'; column does not allow nulls. INSERT fails.
The statement has been terminated.

Source     : MicroFour StrataFrame Business

Stack Trace:
   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)

   [...]

Well, it is true, I do not allow nulls in the column id_saison because this is my primary key column.

This happens with all tables I have in my database and that's why I guess that I just haven't set up the database properly.

Thanks for your help, ...gerhard...