错误的TSQL DISABLE和ENABLE语句

SET ANSI_NULLS ON
SET QUOTED_IDENTIFIER ON
GO

CREATE PROCEDURE [Lending].[uspHMDAUpdateExport] (@BatchId int, @ModifiedById int)
AS
BEGIN
 SET NOCOUNT ON
 SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED

 DISABLE TRIGGER Lending.utrHMDAAudit ON Lending.HMDA

 UPDATE Lending.HMDA SET IsExported = 1,ModifiedById = @ModifiedById WHERE BatchId = @BatchId

 ENABLE TRIGGER Lending.utrHMDAAudit ON Lending.HMDA

END

SET QUOTED_IDENTIFIER OFF 
GO
GRANT EXECUTE ON [Lending].[uspHMDALarInfoGet] TO [caApplication] AS [dbo]
GO

表示禁用和启用语法错误。为什么?