Access stored procedure value with LINQ. Entity Framework 5, DB first

Access stored procedure value with LINQ. Entity Framework 5, DB first

My stored procedure is working correctly. However, I am not able to
retrieve it.
My current function to retrieve the value from the stored procedure is:
public static int GetCsStatus()
{
using (Entities db = new Entities())
{
System.Data.Objects.ObjectParameter s = new
System.Data.Objects.ObjectParameter("Status", typeof(int));
int r = db.proc_CsStatus(120, s);//.ToString());
return r;
}
}
I don't mind if this is changed or not used at all. I am currently getting
a "r" value of -1 when I am expecting a 0 or 1.
Here is my stored procedure:
USE [DATABASE_CS]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[proc_CsStatus]
-- Add the parameters for the stored procedure here
@TimeLimit Int,
@Status Int OUTPUT
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON
-- Declare variables.
DECLARE @LastUpdate Int
-- Calculate the LastUpdate.
SELECT @LastUpdate = DATEDIFF(second, Timestamp, CURRENT_TIMESTAMP)
FROM Heartbeat
WHERE Id=1
-- Compare it to the TimeLimit.
IF @LastUpdate > @TimeLimit SELECT @Status = 0
ELSE SELECT @Status = 1
END
GO
Any input is much appreciated!!!