Parser Error Message: Access is denied

[Christopher]

I’m experiencing the following error. Research I’ve done implies that this is caused by a conflict with index server. I’ve disabled index server and continue to get the error. I’ve also disabled the antivirus real time scanning
The application is running perfectly on other servers. Any help is appreciated

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.CDO'

Source Error:

Line 197: <add assembly="System.Drawing, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/
Line 198: <add assembly="System.EnterpriseServices, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/
Line 199: <add assembly="*"/
Line 200: </assemblies
Line 201

Source File: c:\winnt\microsoft.net\framework\v1.0.3705\Config\ machine.config Line: 19