The type initializer for threw an exception for 'VirtualInfrastructure.Utils.ClientsXml' threw an exception.

When running VI Client 4 or 4 U1, on Vista SP1 x64, I get the following error message.

The type initializer for threw an exception for 'VirtualInfrastructure.Utils.ClientsXml' threw an exception.

and the VI Client exists.

Any ideas, I've found similiar with users running on Windows 7, I've followed those treads, but it still gives me the error message, VI Client used to work, but has stopped.

e.