Are you trying to write to a specific folder on the client or server disk?
If not, perhaps you need to give the ASP.NET user account write permissions
to your temp folder.

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Carsten Thomsen
Enterprise Development with VS .NET, UML, and MSF
http://www.apress.com/book/bookDisplay.html?bID=105
> I have created an ASP.NET project with Visual Studio .Net on our Intranet
> server using file sharing (not FrontPage Extensions).
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>
> Anyone know how to solve this?