Weird video download problem

[nobunaga]

Hi,
I have come across a weird problem-I can download most of the videos using
itunes with no problems ,yet a number of videos refuse to download:the
ones which have problems are all of the type (No Subs) and (JP Subs).What
happens when one of these types is selected ,is that you get the name of the video
being displayed in the white box and the "barber pole" is displayed-normally the
"barber pole" is quickly replaced with the bar marker showing download progress,
but here itunes just keeps displaying the "barber pole" until it is manually
stopped.
Anybody else having this problem?
Cheers,
Ian