Hi Mark,
The issues you are encountering are most likely caused by a disabled environment. You can enable this environment via the GUI. To check on the status of your staging source, do the following:
1. Go to Manage -> Environments
2. Click on the environment containing your staging host.
3. Click on "Databases" and verify that your database is marked as "Use as staging".
4. Verify that the selected environment is enabled. If it is not enabled, use the slider to enable the environment.
I hope that helps. Please let me know if you need anything else.
Thanks,
Srish