Right click dvd drive and click "explore" ?

Hi guy's, hopefully someone can shed some light on this.

I'm running windows xp and if I have a cd rom in the drive and then right the dvd drive and click the "explore" button, it shows me all the files currently on the cd/dvd. Now, I'm running Vista ultimate on a virtual machine and it's running fine but when I click on the "explore" button, instead of showing me what files are on the cd/dvd, a box pops up and says something like " All data will be lost if formatted, do you wish to continue".

Any ideas of why it's not showing me the contents of the cd ?

Should I be doing something different to view the files on the cd ?

Thanks
Sandisk


Sorry I should have posted this in the "Ask vista questions here" thread, so maybe a mod can move it. Sorry bout that