Click start, type Device Manger.
Click Device Manger.
Click on the + next to DVD/CD-ROMS
Delete drivers to old laptop dvd drive, (if you had the original one replaced)
And update the drivers to the current BR Drive (if it is detected.)
Restart system, see if it works.
Also, make sure you have Blu-Ray player software installed, you can't use any regular video player. It has to support Blu-ray playback. Check to see if any software came with your drive, if not, Cyberlink might be a good place to go to find a video player.