Stored procedure fejler på datetime

Jeg har denne SP:


USE TransFleet
IF EXISTS (SELECT name FROM sysobjects
        WHERE name = 'usp_count_parcels' AND type = 'P')
  DROP PROCEDURE usp_count_parcels
GO
CREATE PROCEDURE usp_count_parcels
    @time = datetime,
    @description = varchar(100)
AS

SELECT
a.ParcelNumber,
b.GoodsDescription,
c.TimeStatus
FROM
TransFleet.dbo.CargoLine b,
TransFleet.dbo.OrderParcelNumbers a,
TransFleet.dbo.OrderStatus c
WHERE
b.OrderId = c.OrderId AND
a.OrderId = c.OrderId AND
c.TimeStatus>@time AND c.TimeStatus<@time AND
b.GoodsDescription = @description
GROUP BY a.ParcelNumber, b.GoodsDescription, c.TimeStatus

GO

hvor jeg får følgende fejl:

Server: Msg 170, Level 15, State 1, Procedure usp_count_parcels, Line 2
Line 2: Incorrect syntax near '='.
Server: Msg 137, Level 15, State 1, Procedure usp_count_parcels, Line 17
Must declare the variable '@time'.

Hvordan skal jeg så skrive det ?