Restart the DPM Replication Agent service on %ServerName;. 2) If %ServerName; is configured using certificates, ensure that ...

1) Restart the DPM Replication Agent service on %ServerName;.
2) If %ServerName; is configured using certificates, ensure that the DPM CPWrapper service is running on DPM Server and %ServerName;. Also ensure that certificates used by both the computers are valid.