Multivalue Works Fine In The Sproc But Not In Bids Or Reportserver

Hi,

I have a report which has multivalue parameters enabled and If i give NULL it displays everything correctly. But if I give different ClientId it doesnt do it in the report.. But if i run my sproc in VS2005 and in ssms it works the way i want it. this is my sproc




Code Snippet
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go
ALTER Procedure [dbo].[usp_GetOrdersByOrderDate]

@StartDate datetime,
@EndDate datetime,
@ClientId nvarchar(max)= NULL
AS
Declare @SQLTEXT nvarchar(max)
if @ClientId is NULL
BEGIN
SELECT
o.OrderId,
o.OrderDate,
o.CreatedByUserId,
c.LoginId,
o.Quantity,
o.RequiredDeliveryDate,
cp.PlanId,
cp.ClientPlanId
--cp.ClientId
FROM
[Order] o
Inner Join ClientPlan cp on o.PlanId = cp.PlanId -- and o.CreatedByUserId = cp.UserId
Inner Join ClientUser c on o.CreatedByUserId = c.UserId
WHERE
--cp.ClientId = @ClientId
--AND
o.OrderDate BETWEEN @StartDate AND @EndDate
ORDER BY
o.OrderId DESC
END
ELSE
BEGIN
SELECT @SQLTEXT = 'Select
o.OrderId,
o.OrderDate,
o.CreatedByUserId,
c.LoginId,
o.Quantity,
o.RequiredDeliveryDate,
cp.PlanId,
cp.ClientPlanId
--cp.ClientId
FROM
[Order] o
Inner Join ClientPlan cp on o.PlanId = cp.PlanId --AND cp.ClientId in ('+ convert(Varchar, @ClientId) + ' )
Inner Join ClientUser c on o.CreatedByUserId = c.UserId
WHERE
cp.ClientId in (' + convert(Varchar,@ClientId) + ')
AND
o.OrderDate BETWEEN ''' + Convert(varchar, @StartDate) + ''' AND ''' + convert(varchar, @EndDate) + '''
ORDER BY
o.OrderId DESC'
exec(@SQLTEXT)
END
--return (@SQLTEXT)




I have 2 datasets in this report one for the above sproc and other dataset that gives me the clientname and it is as follows




Code Snippet

ALTER Procedure [dbo].[usp_GetClientsAll]

@ClientId nvarchar(max) = NULL

AS

--Declare @ClientId nvarchar(max)

SELECT

NULL ClientId,

'<All Clients >' ClientName

FROM

Client

Union

SELECT

ClientId,

ClientName

FROM

Client

Where

ClientId = @ClientId

OR

(

ClientId = ClientId

OR

@ClientId IS NULL

)






In the first dataset Parameter list i have omitted ClientId but kept it in the report parameter.. So when i give select all it works.. but when i just select particular it gives me the same result as Select all..

any help will be appreciated..
REgards
Karen