Will not rip movie Rob Roy

The blu-ray ripper does not recognize that there is a disk in my blu-ray drive. I have ripped over 400 movies and this is the only one that it will not even see the disk in the drive. I have other ripping software that rips it ok but has other problems, so I’d rather use Aiseesoft blu-ray ripper.

There are two folders on the disk

AUDIO_TS (empty folder)
VIDEO_TS (11 files in the folder)

Any idea why it won’t recognize the movie?

I discovered if I just click on the drive letter it will still read the dvd even though there is no name next to the drive letter.