Error en SP "Invalid colunm name"

[ContraVeneno]

Código SQL [-]
SET QUOTED_IDENTIFIER OFF 
GO
SET ANSI_NULLS OFF 
GO

-- Exec BuscaCliente 'Juanito'
CREATE PROCEDURE  BuscaCliente
@Cliente varchar(20)
AS
Declare @Result bit
Declare @Nombre varchar(20)

Select @Result = 1, @Nombre = Cliente
From Clientes
Where Cliente = @Cliente

Select IsNull(@result,0) as Resultado, @Nombre as Nombre

SET QUOTED_IDENTIFIER OFF 
GO
SET ANSI_NULLS ON 
GO