New External Plextor DVD+R/CD-R USB Drive

[WaltR]

Wow! I've spent an hour and half going through the forum looking for an answer to my problem and I can't find it. I don't have all day to spend so I hope I am not out of line by making my first post.
I purchased a new Plextor external Drive last week along with Holster and the rest of the MTU prorams. I have been loading my cdg disk into Holster a littel bit at a time and now have loaded 50 disks. Here is my problem/question. Last night one of my disk (Music Maestro #6288) would not load. The drive would not read it. However, it works in the rest of my Karaoke equipment. Since the drive would not read the disk in any of the MTU programs, I assume it is the drive. Is this normal to expect 1 out of 50 disks not to be read or should I look at this as a problem with the new drive? Since it reads in my other Karaoke equipment (Pioneer) I assume the disk is ok. Any feed back would be greatly appreciated.

Thanks,
WaltR