Problema con tipo de dato de fecha en procedured

[th3r0rn]

Hola, tengo la siguiente consulta:

Código SQL:

SELECT  h.hora AS hora1,h.marca,h.codoptima AS codoptimaT,h.target,h.fecha AS hfecha,P.CODOPTIMA,O.CODIGO,
    p.hora,p.peso,p.vaso,p.fecha,o.linea,o.tubo
    INTO #tmp3
    FROM pesos AS p, optimas AS o,htargets AS h
    WHERE o.codigo = p.codOptima AND o.linea = 'L17S'
    AND o.tubo = 'D' AND p.fecha >='20100628' 
    AND h.fecha  >='20100628' 
    AND p.hora= '9:30 - 10:00' AND h.codoptima = o.codigo AND h.hora= '9:30 - 10:00'
    SELECT *,(SELECT COUNT(1)total FROM #tmp3) AS totality FROM #tmp3
 

La ejecuto y me da los datos correctamente, ahora bien elabore un procedured pero este me da error, el procedured es:

Código SQL:

SET ANSI_NULLS ON
SET QUOTED_IDENTIFIER ON
GO
 
 
 
CREATE PROCEDURE [dbo].[monitor]
@fecha datetime,
@linea nvarchar(5),
@tubo nvarchar(5),
@hora nvarchar(15) AS
BEGIN
    SET Nocount ON
    SELECT  h.hora AS hora1,h.marca,h.codoptima AS codoptimaT,h.target,h.fecha AS hfecha,P.CODOPTIMA,O.CODIGO,
    p.hora,p.peso,p.vaso,p.fecha,o.linea,o.tubo
    INTO #tmp1
 
    FROM pesos AS p, optimas AS o,htargets AS h
    WHERE o.codigo = p.codOptima AND o.linea = @linea
    AND o.tubo = @tubo AND p.fecha >=@fecha 
    AND h.fecha  >=@fecha
    AND p.hora= @hora AND h.codoptima = o.codigo AND h.hora= @hora
    SELECT *,(SELECT COUNT(1)total FROM #tmp1) AS totality FROM #tmp1
END
 

Al ejecutarlo: monitor'L17S','D','20100628','9:30 - 10:00' me da el siguiente error:
Msg 8114, Level 16, State 4, Procedure monitor, Line 0
Error converting data type varchar to datetime.

Cual sera mi problema?