can't delete audio file
I am working in Presenter '09. I am trying to delete an audio file. I go into the "import audio" icon and then highlight the proper slide and then click on the "remove" button. The file disappears under the "Audio" column, but when I preview the slide, the audio I thought I deleted is still there. I have deleted lots of files using this approach in the past, so I am not sure what I am doing wrong.