It does sound like a CSS related problem, ensure that your service queue ports have the appropriate CSS are partitions. Similarly ensure that the device your transferring to have a CSS which has the partition associated with the SQs. What you are referring to is direct transfer when you bypass the service queues in order to present the original callings party. When you configure this, ensure that you've closed down the console app before making the registry change. If this doesn't work then then you need to confirm the CSS on the destination device.