With the information provided, I can only offer a few possible issues:
1. The drive cannot read the disc type, IE, you're putting a DVD in a CD-ROM drive, or the drive comes from the DVD-R and DVD+R fighting era, and you're putting a type in it cannot read.
2. The disc can't be read, try putting it in another computer to ensure it's actually a readable disc, and the problem is in fact drive specific.
3. The drive is simply broken, depending on how old it is, it's not unlikely that there is just a physical issue with the drive, they're cheap, so replacing one isn't a huge deal.
Hope one of those helps!