CryptProtectData failed when calling from ASP.NET

From: poifull (poifull76_at_yahoo.com)
Date: 04/27/05 

Date: Wed, 27 Apr 2005 05:45:09 GMT

Hi Everyone,

When I call the CryptProtectData function from an ASPX page, I got the
following error:
    The system cannot find the file specified

I'm getting the error only when ASP Impersonation is used by setting the
<IDENTITY> tag in web.config. Without impersonation the ASPX page works
fine.
The funny thing is if I use RUNAS to open a CMD window with the account
specified in <IDENTITY>, the ASPX page works!

The library is copied from the article "How to: Create a DPAPI Library"
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnnetsec/html/SecNetHT07.asp

Any help will be appreciated.

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