Article ID: 8576, created on Jun 7, 2010, last review on May 11, 2014

  • Applies to:
  • Plesk 10.x for Windows
  • Plesk 9.x for Windows


When trying to open the ASP.NET webpage, you receive the following error in your browser:

Parser Error Message: Could not load file or assembly 'System.ServiceModel, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. Access is denied.


The error is caused by incorrect permissions on .NET assemblies.


Please set up correct permissions for the .NET assemblies with the following commands:
cacls C:\Windows\assembly\GAC_MSIL /E /R psacln /T /C
cacls C:\Windows\assembly\GAC_MSIL /E /R psaadm /T /C
cacls C:\Windows\assembly\GAC_32 /E /R psacln /T /C
C:\Windows\assembly\GAC_32 /E /R psaadm /T /C

With these commands, denied permissions are removed for the groups psacln and psaadm.

Restart IIS to complete the operation.

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