Hi,
You can try to use the same local username/password on your HN and Workstation node. Here is what you need to do:
1. Go to cluster Manager and click cluster configuration, set up cluster admin account with a locan account on HN (say HN\admin)
2. Add local user admin on workstation with the SAME password as the local user HN\admin on HN
3. Try to connecto to HN from Workstation.
Please let me know if you need further assistance.
Michael