HELP ME MY DVD DOESNT READ?

guys my dvd writer doesnt read dvds at first when the software installer said that it was good and read dvds as well as cds bit after a month i bought 6dvds to write games on it but this happend 1st dvd didnt detect didnt write and was automatically ejected by nero saying that drive was empty 2nd dvd detected... show more guys my dvd writer doesnt read dvds at first when the software installer said that it was good and read dvds as well as cds bit after a month i bought 6dvds to write games on it but this happend
1st dvd didnt detect didnt write and was automatically ejected by nero saying that drive was empty
2nd dvd detected wrote half and suddenly saying that drive was empty ejected by nero
3rd 4th and 5th same as first one
6th dvd was said that windows is currently using the cd
i use nero 7 ultra edtion
pls say how to make my dvd read
i use high quality SONT DVD-R 120MIN/4.7GB
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