I have a problem to deploy a triger in DDT, my trigger code as bellow:

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AFTER INSERT
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON

AS
BEGIN

    -- Prevent the result count from interfering
    SET NOCOUNT ON;

    -- Add trigger logic here
 declare @curid int, @curcode nchar(5), @cureffectivedate smalldatetime, @currate smallmoney, @lastuser nvarchar(25)
 select @curid=curid, @curcode=curcode, @cureffectivedate=cureffectivedate, @currate=currate, @lastuser=lastuser from inserted
 insert into exchangerate values (@curcode, @curid, @cureffectivedate, @currate, @lastuser, getdate())
END
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too simple but I don't know why can not to delpoy it, the error message as bellow.