iTunes download error code: stopped (err = -5000)

hello - I recently did a reinstallation of 10.8.5 and migrated all my user data via the Migration Assistant

this worked all very smoothly, however since then I am not able to download podcasts in iTunes any longer, I can listen to the stream, however when

attempting a download I get the following error code: stopped (err = -5000)

is there a way to reset iTunes to enable the download again, or another trick that might help

it would be brilliant to hear

Florian