I have an external DVD R/RW is a HP dvd640 with lightscribe.The problem i have is that looks if my computer doesn't recognize the drive cuz when i insert a blank dvd i point to the drive and click properties a pie chart appears in blue like if the dvd is full.The same thing is with all kind of blank dvd(dvd+R-R/RW ETC...). Any help will be appreciate,thanks.