GuestOperationsUnavailable

Hello,

I need to use the InitiateFileTransferToGuest method to put a file(s) on a VM(s).  I could not get my code to work (no GuestFileManager available?), so I tried to invoke the method using the MOB.  When I do that, I get a message saying, "GuestOperationsUnavailable".  Can anybody tell me what to do to make GuestOperationsAvailable?

Much Thanks!