Lite on dvd/rw sohw 1693sx doesnt read anything

i have a lite on dvd/rw sohw 1693sx and it onced it doesnt read any discs.just makes was burning a dvd from some other program than nero. it stopped burning 60 %then 20 mins later i had to manually eject it. now it doenst read anything.its also listed as a cd drive. help me put an end to this headache. i just bought a **** load of blank dvd’s 2