Execute sql task failing

Hi All

I am using the following link to load data into temp tables and then use them for the final load (https://stackoverflow.com/questions/5631010/how-to-create-a-temporary-table-in-ssis-control-flow-task-and-then-use-it-in-dat)

However after the first SQL Task was created the execution is failing with the following error 

[Execute SQL Task] Error: Executing the query "exec dbo.PopulateFinancialRecords" failed with the following error: "Unsupported data type on parameter binding @SnapshotDate.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.

My stored proc code

SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO


CREATE PROCEDURE [dbo].[PopulateFinancialRecords]
AS
BEGIN

    SET NOCOUNT ON;
	declare @SnapshotDate date;
declare @StartDate date;
declare @EndDate date;

set @StartDate = @SnapshotDate
     set @EndDate   = dateadd(ns, -100, dateadd(day, 1, @SnapshotDate));
IF OBJECT_ID('TEMPDB.dbo.#financial_records') IS NOT NULL DROP TABLE #financial_records
select f.Src_id
     , f.create_date
     , f.floorplan_id
     , f.fee_type_id
     , f.amount_applied
     , f.responsible_business_id
     , f.currency_id
     , f.financial_record_type_id
into ##financial_records
from revenue f
where create_date
between @StartDate and @EndDate;
end
GO

In my SSIS Package i create a variable "populatetemptable" and its value is exec dbo.PopulateFinancialRecords. In the general settings the execute sql task looks like below

and i have the parameter mapping as below

when i run the execute task i am getting the following error , please need advice

[Execute SQL Task] Error: Executing the query "exec dbo.PopulateFinancialRecords" failed with the following error: "Unsupported data type on parameter binding @SnapshotDate.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.

Thanks