i got this problem that my when i go to copy disc to a disc using nero burning rom,it keeps saying to insert blank disc to copy to,but there's already an empty disc in the burner and it just opens up the drive,and the burner works when i burn my mp3 files but it doesn't work when i want to copy disc to disc on a cd-r or dvd-r MY BURNER IS AN EMPREX DVDRW-IDE1004 can someone pls help????thanks