17488 Podcast update syetm

I have a podcast service - a weekly fishing report. Currently I manually upload an audio (mp3) file once a week and change the html on the page to indicate the name of the newly uploaded file. You can see (hear) it at [login to view URL] It is listed on Itunes etc. While it works for those who click on the link and listen, it does not update those subscribed to my podcast. I would like someone to set it up so I upload an audio file and (if need be the xml file) and it updates subscribers. I'm using Feedburner at present. Thanks for your interest. Dave