I reloaded the operating system [XP PRO] today, got a TDK DVDRW0404N optical drive in this Compaq desktop D510S, it works fine whenever I load a music cd or Movie DVD but does not whenever I should load my Nero installation cd it does not work, my other software application cd's work fine just not this Nero cd, in my computer where the DVD icon is supposed to be, I am seeing a shaded out icon which looks like a copybook page dog-eared on the right top corner with a square icon inside of it which has 6 little icons in it and the number I am seeing next to the copybook page reads :

NE660_15 [D]

when I load a music cd, this icon changes to show as "audio cd [D]", when I load a DVD it shows as "DVD [D]", this is the first time I am seeing this problem, I had loaded Nero from this same cd on this same pc before reformatting, why it is not reading this cd now? Please note that nothing is wrong with this Nero cd itself, it works fine on any of my other pc's.