Error adding files to .pset

When I get a .pset file set up, I go to add the files by dragging them to into print organizer.  After it apparently loads all the files, I get the following error.  Any ideas?

 

"Exception encountered inside [WorkerMicroStationProxy.LoadDesignFile] "

Message details:

The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communication because it is in the Faulted state."

 

 

Thanks for any help,

 

-Andy Wynn