Loss of Thumbnails Help Requested!

[Budge]

I am in process of changing computer hardware and have just rebuilt my
GiP setup on the new machine, or so I thought.  Cron pvr job ran fine 
last night but the radio download of The News Quiz is not showing a 
thumbnail on my player.

Please could somebody remind me of the essential components for getting
the thumbnails incorporated into file metadata.
Budge