Different row counts between SQL management studio and Visual Studio

Question

Hi
I'm pulling data from a NAV database using a stored procedure containing a Pivot (due to bad table design), the problem is my SQL management studio is returning 53 rows of records yet Visual studio is only returning 5.
I initially copied the query from management studio into VS to create my dataset, however after returning very few records I used a stored procedure instead.
Unfortunately the same result occurred, 5 records instead of 53,
Is there something different between the two systems, perhaps VS doesn't like something in the Pivot?
Can anyone help?
Thanks
Charlie
CREATE
PROCEDURE [dbo].[PosReleaseTestPrepared]
--@Date AS DATETIME
AS
BEGIN
-- -- SET NOCOUNT ON added to prevent extra result sets from
-- -- interfering with SELECT statements.
-- SET NOCOUNT ON;
--    -- Insert statements for procedure here
DECLARE @cols
NVARCHAR(MAX),
@stmt NVARCHAR(MAX)
SELECT        @cols
=
ISNULL(@cols
+
+
+ ES.Code
+
FROM          
(SELECT       
Code
FROM            dbo.[Branston
Live$Enquiry Step]
WHERE        [Enquiry Code]
=
'PREPARED')
AS ES
SELECT        @stmt
=
    SELECT *
    FROM
    (SELECT PR.[Entry No_], PR.[Mobile User Code], PR.[Failure Step Code],PR.[Item No_], PR.[Customer No_] ,[Enquiry Step Code],  Value
     FROM dbo.[Branston Live$Positive Release] PR
      LEFT OUTER JOIN dbo.[Branston Live$Positive Release Step] PRS
       ON PR.[Entry No_] = PRS.[Positive Release Entry No_]
     WHERE PR.[Enquiry Code] = ''PREPARED'') PR
     PIVOT
      MAX(VALUE)
      FOR [Enquiry Step Code] in ('
+ @cols
+
     ) AS P'
EXEC
sp_executesql@stmt
END
GO

Answer 1

Hi Satheesh, Latheesh
I'm using a shared data source in VS, the server and database are definitely pointed to the right location. As is the Stored procedure/SQL query. The table names "PositiveRelease" are bespoke to us and therefore are easy to recognise.
Below is one of the 5 records from the VS report:
Mobile   User Code
Customer   No 
Item   No 
Failure Step Code
Depot   Date
PP_GY
102980
S10586
DEPOT_DATE
17/02/14
Below is the record from the SQL management studio, you can see it is pulling through matching records.
Mobile User Code
Customer No_
Item No_
Failure Step Code
DEPOT_DATE
PP_GY
102980
    S10586
DEPOT_DATE
17/02/2014