It seems you and a other member have the same problem,
I think I got the awser to your problem. You are probably testing on your localhost.
Is it by any chance that you PHP directory is located c:\Program Files or c:\Windows
You need to set the permissions on the folder PHP.
Use windows explorer en select properties of this folder and change the permisions.
This has been discussed on this forum before check it out
http://p2p.wrox.com/topic.asp?TOPIC_ID=8169.
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