DVD not recognised

I have a movie DVD which plays in a Pioneer DVD player but not on my Sansui DVD player. Whats worse, it is not even recognized by the drive on my computer (TSSTcorp DVD-ROM drive) and my laptop drive. I dont know the region of the DVD, but it has the symbol of a globe with a number 2 written on it. I changed my drive to region 2 still the dvd is not recognized. What do I do?

Is it an original DVD. Sometimes an original DVD will not play on a computer until the copy protection is circumvented. Get DVDFabDecrypter and then it should work. Once it is recognized and plays on the PC, you can rip it and work with it.