I am trying to burn an image file. I get to the window that asks for which drive i want, how many copies, etc. I have verified that i'm using the correct drive, and i click start. A message pops up that says waiting for disk at top. The body of the window includes a 2 column chart, one for the drive name, and the 2nd column is the drive status. Initially it says no disk, then i put in an empty dvd. Then the 2nd column changes to "Empty Disk (DVD)". And it does not continue. It just stops there, the timer is still going, but my only choice is still "Cancel". What's going on?