If this is a new setup then try to make sure that the Snapshot is not being used by any other functions. Check the Snapshot to be sure that it is only for the Data Replication for the NAS volume that you are using. Update to version 5087 there was some improvements with the Data Replication.
How many files are you replicating and what size variables are they so lets say 100 or 1 Million files (small or large or both).
