I have just perchased a pack of five Tevion DVD+R disks which when I put them in the DVD RW drive and right click and then click properties the disk apears full all space used, I have gone into drive management and the disk is reported as empty with 100% free space? the disks will not write to as they are reported as full. I have tried all the help and support in windows xp without any success, I have a Medion XL computer running windows XP a DVD RW drive and a DVD rom drive, do I have to format the disks before use? and how do I do that as when I go into disk management the format option is greyed out. please help. Trojan.