datetime SQL 2000 Stored Procedure EXEC(@sqlStatement)

Dear Experts,

How can I use datetime value in SQL 2000 Stored Procedure EXEC(@sqlStatement)?

I have this Error Message :
Running [dbo].[InventoryTest] ( @whereClause = ProjectNo=N'7812', @startdate = 01/01/10, @enddate = 09/09/10 ).

Syntax error converting datetime from character string.
No rows affected.
(0 row(s) returned)
@RETURN_VALUE =
Finished running [dbo].[InventoryTest].

from Stored Procedure Codes:
ALTER PROCEDURE dbo.InventoryTest
(
      @whereClause nvarchar(4000),
         @startdate datetime,
      @enddate datetime
)
AS
DECLARE @sqlStatement nvarchar(4000)
SET @sqlStatement = '

SELECT     GroupID, ProjectNo, ProductID, ShipDate, BO, USPS, Transfer, FF, Allocated, DM, SM, UPS, Process, Mailed, Received, Adjust, Spoilage
FROM         (SELECT     GroupID, [Project #] AS ProjectNo, [Product #] AS ProductID, ShipDate, BO, USPS, Transfer, FF, Allocated, DM, SM, UPS, Process, Mailed,
                                              0 AS Received, 0 AS Adjust, 0 AS Spoilage
                       FROM          vw_OrderDetails) AS Q2
WHERE     (ShipDate < ' + @startdate + ')'

EXEC(@sqlStatement)

RETURN