Really weird occurence with singer's disk.

[bryant]

Last night at a gig I was using my Hoster test machine as seen in my signature while the following happened.

I imported a singer's disk ok. Went in as usual. I moved the song around in the playlist to her order in the rotation. Twenty minutes later when I hit play, the song turned to error and a message came up saying something like "cannot find your song, it could have been moved to another HD", or something like that.

I imported again and it went in again and played the second time clear as a bell.

The scary part about this is this girl may be using this disk this Saturday at a highly advertised karaoke competition in town where I have been asked to host.
I checked the disk and it was really clean. I have already spoken to all contestants to make sure that if they DO bring in their own disks that they are really cleaned up and give them to me an hour early. However, I would not have thought of replaying each one if they imported correctly.

Is there anything anyone can think of that could have allowed the song to import perfectly as always but error out when I clicked on play?