RunspaceFactory.CreateRunspace causes CLR error.

I have an application that uses PowerShell to check the status of a particular service on a remote server.  The app runs fine on my Windows 8 development computer but generates an error when published via click-once to a Windows 2008 R2 server. The error occurs on the CreateRunspace command.  Here is the code (I'm using Visual Studio 2013 - Basic Language):

            Dim connectionInfo As New WSManConnectionInfo(serverUri, SHELL_URI, remotecred)
            Dim myRunSpace As Runspace = RunspaceFactory.CreateRunspace(connectionInfo)

As soon as the program hits the 2nd line above, I get the following error:

"Common Language Runtime detected an invalid program"

I thought at first that it might have something to do with the "Target CPU" setting but it does not seem to have any effect.  I have also included all references in the "Application Files" section of the Publish page but that doesn't work either.  I read somewhere to try the "Clean" function on my app but that did not work.

Can anyone suggest what to try next?

Thanks.

Mike

"MC"