Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Defective DVD

It seems this particular DVD is defective for some DVD players. I've received 2 from Stamina and one through a seller at Amazon and not one plays on my machine. There's nothing wrong with my player; every other DVD I have plays just fine. For some reason the Level 1 Workout was not programed for all players and Stamina should figure out how to solve the problem. This has been very frustrating all around.