iTunes error -3256?

Hi,

While downloading media from Apple Store I started to get 3256 error msg. I ran a search on the forum but nothing.
If I stop the downloads and resume it back on it starts to download again but only for 2 mins or so then I get the same msg...weird
Any ideas? By the way I have iTunes 9.2 and have been downloading almost 600 media files the last 10 days,no problems until now.

Many thanks