Fejl i uploadscript

hejsa
jeg får denne fejl ved et upload script :

Persits.Upload.1 error '800a0005'

The system cannot find the file specified.

/admin/menu/tilfoej.asp, line 15


Hvad kan det skyldes? Upload linierne ser sådan ud :

<%
if request("kode")="ny" then
Set Upload = Server.CreateObject("Persits.Upload.1")
Upload.OverwriteFiles = False
Upload.SetMaxSize 2048576
Upload.Save server.mappath("/images/")
%>

Linie 15 er den med mappath.