Strange, intermittent "Configuration Error" involving a COM DLL

[jb_in_marietta]

I have a Dot Net project that references a COM DLL called
"Crypto.dll," which is registered on my machine. I added the reference
via the "Add Reference" dialog in Visual Studio Dot Net, and I am
successfully accessing methods in this DLL in some of my classes.

"Interop.CRYPTOLib" is the name of the interop VS.NET created for me
when I added the reference.

Frequently, when I try to run my application, I get the error that
follows.

What's very frustrating and puzzling is that sometimes this error
occurs and sometimes it doesn't; it will occur 10 times in a row, then
I'll walk away from my desk for 15 minutes, and the application will
run fine.

Rebootimg my machine always seems to fix the error, but only for a
short period of time; it always recurs eventually.

Any help that anyone could give me on this would be greatly
appreciated...I'm really stumped! Thanks in advance!!

--JB

---------------------------------------------------------

HERE IS THE ERROR:

Configuration Error
Description: An error occurred during the processing of a
configuration file required to service this request. Please review the
specific error details below and modify your configuration file
appropriately.

Parser Error Message: Access is denied: 'Interop.CRYPTOLib'.

Source Error:
Line 196: <add assembly="System.EnterpriseServices,
Version=1.0.5000.0, Culture=neutral,
PublicKeyToken=b03f5f7f11d50a3a"/>
Line 197: <add assembly="System.Web.Mobile, Version=1.0.5000.0,
Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/>
Line 198: <add assembly="*"/>
Line 199: </assemblies>
Line 200: </compilation>
Source File: c:\winnt\microsoft.net\framework\v1.1.4322\Config\ machine.config
Line: 198

Assembly Load Trace: The following information can be helpful to
determine why the assembly 'Interop.CRYPTOLib' could not be loaded.
=== Pre-bind state information ===
LOG: DisplayName = Interop.CRYPTOLib
(Partial)
LOG: Appbase = file:///C:/Inetpub/wwwroot
LOG: Initial PrivatePath = bin
Calling assembly : (Unknown).
===

LOG: Policy not being applied to reference at this time (private,
custom, partial, or location-based assembly bind).
LOG: Post-policy reference: Interop.CRYPTOLib
LOG: Attempting download of new URL
file:///C:/WINNT/Microsoft.NET/Framework/v1.1.4322/Temporary ASP.NET
Files/root/8073f566/7100ac34/Interop.CRYPTOLib.DLL.
LOG: Attempting download of new URL
file:///C:/WINNT/Microsoft.NET/Framework/v1.1.4322/Temporary ASP.NET
Files/root/8073f566/7100ac34/Interop.CRYPTOLib/Interop.CRYPTOLib.DLL.
LOG: Attempting download of new URL
file:///C:/Inetpub/wwwroot/bin/Interop.CRYPTOLib.DLL.
LOG: Policy not being applied to reference at this time (private,
custom, partial, or location-based assembly bind).
LOG: Post-policy reference: Interop.CRYPTOLib, Version=1.0.0.0,
Culture=neutral, PublicKeyToken=null


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Version Information: Microsoft .NET Framework Version:1.1.4322.573;
ASP.NET Version:1.1.4322.573