I've never had that problem. You might need to reinstall itunes.

go to podcasts and type in the name of the podcast you want and a button will come up with subscribe and you click on it and a little box

will appear asking if you want to subscribe and it will automatically upload all new episodes for you

knittersue: i see a subscribe button for audio podcast but not the video ones.

afreespirit: thanks, i'll try that next.