Ummm... what were you expecting to see in a blank disk? If it's blank even XP doesn't know what to do so it takes a guess and says it's a CD in the drive.... because it is blank, not much to indicate the disk type, there is no file system on the disk to clue XP in on what's there.
After you record (burn) something on the disk it will be recognized for what it is, until then it's like guessing what the contents of an empty glass will taste like if you drink it, no?