DECLARE @OrderNumber NVARCHAR(150);
 IF EXISTS(SELECT * FROM INSERTED)
    BEGIN
    SELECT @OrderNumber=i.OrderNumber FROM inserted i;
     EXEC [dbo].[YOUR_STOREPROCEDURENAME]
          @InGuidKey = N'',
          @InParameter1 = '',
         @InParameter2 = '',
         @InDebugModeOn = N'0'
    END