For certain podcasts, you may need to set authorization information in order to retrieved the feed file of that podcast. Following shows how to set that information:
- Open context menu of that podcast
- Select 'Properties' menu option, which will open Properties dialog
- Switch to the 'Synch' tab
- Check the checkbox called 'Authorization is required'
- Enter the correct username and password
- Click on 'Apply' button to apply this change