Thanks Jasem,

I followed your steps - thanks. But I'm still having the same problem. Here is a printout of the errors:

2017-02-08T17:26:17: If your camera mirror lock is enabled, you must set a value for the mirror locking duration.
2017-02-08T17:26:17: Failed to expose.
2017-02-08T17:26:16: Error downloading image from camera: Directory not found
2017-02-08T17:26:14: Starting 1 sec exposure
2017-02-08T17:26:13: If your camera mirror lock is enabled, you must set a value for the mirror locking duration.
2017-02-08T17:26:13: Failed to expose.
2017-02-08T17:26:12: Error downloading image from camera: Directory not found
2017-02-08T17:26:10: Starting 1 sec exposure
2017-02-08T17:26:08: If your camera mirror lock is enabled, you must set a value for the mirror locking duration.
2017-02-08T17:26:08: Failed to expose.
2017-02-08T17:26:07: Error downloading image from camera: Directory not found
2017-02-08T17:26:05: Starting 1 sec exposure
2017-02-08T17:26:04: If your camera mirror lock is enabled, you must set a value for the mirror locking duration.
2017-02-08T17:26:04: Failed to expose.
2017-02-08T17:26:03: Error downloading image from camera: Directory not found
2017-02-08T17:26:01: Starting 1 sec exposure
2017-02-08T17:26:00: If your camera mirror lock is enabled, you must set a value for the mirror locking duration.
2017-02-08T17:26:00: Failed to expose.
2017-02-08T17:25:59: Error downloading image from camera: Directory not found
2017-02-08T17:25:57: Starting 1 sec exposure
2017-02-08T17:25:56: If your camera mirror lock is enabled, you must set a value for the mirror locking duration.
2017-02-08T17:25:56: Failed to expose.
2017-02-08T17:25:55: Error downloading image from camera: Directory not found