I've been trying for days to get this sorted now!

I'm subscribed to the Radio 4 Friday Night Comedy Podcast. The Now Show are doing a series of special shows called The Vote Now Show - the one from the 19th April refuses to go onto my iPod.

There's plenty of room on the iPod (1.37GB free) but it just won't transfer over.

Any ideas?

And why does iTunes say my iPod have 315MB of video but there are no videos at all on there?