If I change to PersistenceMapperWEBAPIClient:
this.PersistenceMapper = this.persistenceMapperWEBAPIClient1;
I get error message on start:
System.IO.FileNotFoundException: "The file or assembly "Microsoft.IO.RecyclableMemoryStream, Version=1.4.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" not found
/Efim