ATAPI DVD A DH16A1L Reading Problem

I made a copy of my home movie with verbatim 8X DVD. I could play well with other computer DVD rom and my sony DVD player.
When I tried to play this home made DVD with HP 8120N computer which has a ATAPI DVD A DH16A1L DVD drive, could not play it. It recognize my home made movie DVD as a blank DVD.
Do you have any idea for this problem?

Welcome to the forum, sounds like a software problem. Try this unistall the drive in the device manager then reboot the computer, Windows will install it again automatically.