Security exception

I am getting a security exception when attempting to write to the application log using C# in an ASP.NET application. The error message states "Requested registry access is not allowed." I was able to correct the same problem and successfully write to the application log using Windows Server 2000 and 1.0 version of the .NET Framework by changing the process model attribute for username in the machine.config file from machine to SYSTEM to allow the ASP.NET user to have adequate rights to update the Windows application log. I make the same change to the machine.config file for .NET Framework 1.1 running on Windows Server 2003 and it does not correct the problem. Can anyone help me with a solution? Thank you.<br><br>Kyle