i remember the good old days when i was able to drag and drop a file into an cd drive window, click on file, then burn. i have lost the ability to do this at some point and i have no idea why. i get a message saying that the source file is in use (which is a lie. windows hates me). i have tried with several different types of disc (cd-r, cd-rw, dvd-r, dvd-rw, cd+r) and none of these are working. any ideas?