Parameter value coverts to INT from VARCHAR within Define Query Parameter window used in Proc within Query Designer - SSRS 2008

I'm having an issue with SSRS 2008.

 I have a stored procedure that has a parameter set up into it. So when ever I run the stored procedure in the Query Designer within SSRS, a Define Query Parameter window pops up asking to input the parameter value. As I enter the value (value is set as varchar), SSRS gets confuses and thinks it is an integer; therefore, it converts the number who has leading 0s in front of it to an integer and removes the leading 0s. Is there a way to go around this?

Here is my proc I used in the report:

PROCEDURE [dbo].[REPORT](IDASVARCHAR(100))

AS

DECLARE @ReportASVARCHAR(8000

)

@Date ASVARCHAR(100)=CONVERT(VARCHAR(50),GETDATE(),112

)

@Report ='SELECT *FROM DatabaseName.dbo.Table_'+ @ID +'_'+ @Date+'_OUTPUT' 

(@Report

)

 I then Input the report proc name into the Query Designer Window within SSRS. So, when the query design window is being run, it prompts for the @ID parameter which is a define as a VARCHAR in proc, but when I enter the paramater value = 0123. It displays back   these:

Error occur while executing query: Invalid name : DatabaseName.dbo.Table_123_20111108_OUTPUT (notice that the "0" has been removed in front of the 123 within the table name.

Is there a way to pass by this error in SSRS. To have it know it's a varchar field not a INT field? HELP!!!! Has anyone else experience this issue????