Podcast Download Error -39

This has happened to me three times now. When I am in the middle of downloading a podcast, my computer has either frozen or lost internet connection, so the podcast download gets interrupted. Once I restart, or reconnect to the internet, and go back to the list of podcasts, the one I was downloading is grayed out. I push the "Get" button next it and I get this error message: 'There was a problem downloading (said podcast). An unknown error occurred (-39). Please check that the URL is correct and the connection to the network is active and try again.' I have tried resubscribing to the podcast and even reinstalling iTunes. I didn't know if maybe there was a partial file saved somewhere that is making iTunes think there's still a problem. I don't know where to look for that though. Anyone else had this problem before or know what I should do to fix it??