The schema returned by the new query differs from the base query error

Question

 

Hi guys m working with vs2005 and SQL2005,

When i try to add a query to my table adapter its saying: The schema returned by the new query differs from the base query

And m building the query in the query builder and it says its correct , but when i want to add the query m getting the error here's the query:

SELECT     Bestellingen.Totaalprijs, BestellingInhoud.Aantal, BestellingInhoud.Prijs_per_stuk,
                      BestellingInhoud.Aantal * BestellingInhoud.Prijs_per_stuk AS Expr1
FROM         Bestellingen INNER JOIN
                      BestellingInhoud ON Bestellingen.BestellingID = BestellingInhoud.BestellingID

I hope somebody has any solution m getting sick of that error