asp文件删除奇怪现象

function SaveFile(LocalFileName,RemoteFileUrl)
Dim Ads, Retrieval, GetRemoteData ,
Set Retrieval = Server.CreateObject("Microso" & "ft.XM" & "LHTTP") '//把单词拆开防止杀毒软件误杀
With Retrieval
.Open "Get", RemoteFileUrl, False, "", ""
.Send
GetRemoteData = .ResponseBody
End With
Set Retrieval = Nothing
Set Ads = Server.CreateObject("Ado" & "db.Str" & "eam") '//把单词拆开防止杀毒软件误杀
With Ads
.Type = 1
.Open
.Write GetRemoteData
.SaveToFile Server.MapPath(LocalFileName), 2
.Cancel()
.Close()
End With
Set Ads=nothing
if err <> 0 then
SaveFile = False
response.write"err,"
err.clear
else
SaveFile = true
end if
End Function
调用此函数传入的2个参数没问题，但有时候能执行成功有时候不能，搞不明白此函数有何不妥，望高手给我个解决办法 谢谢了