Exception on WSCript.Shell Run method

Hi,

I'm facing an strange issue on my Silverlight LOB app. I'm trying to launch notepad from Silverlitght App (It has elevated permissions) but I'm receiving an exception.

My code looks like:

if (AutomationFactory.IsAvailable)
{
     dynamic cmd = AutomationFactory.CreateObject("WScript.Shell");
     cmd.Run(@"C:\RemotePdf.pdf", 1, true);
}

When cmd.Run method is executed I recieved a RuntimeBinderException with message: "'object' does not contain a definition for 'Run'.

I have checked this code with a single silverlight app and it works as expected.

What I'm doing wrong)

Thanks