Some DVDs wont play
 

Hey everyone
i seem to having trouble with the new DVD writer i got today
it will only play some dvds and wont play others
for example i put in last samurai in the drive it plays fine
but when i put in say matrix it spins for a while but nothing happens
i go to the drive and open it
nothing is in it
nothing pops up when i put it in
im hoping some one here can help
thnx in advance

im sorry i meant to say i open it back up and push it back in it still doesnt play

i dont know why i put it wasnt there