Newsdemon = Highwinds. At the moment they're really aggressive with takedowns, hence all the bad user comments recently about them.

Yeh take down due to copyright some providers like highwinds you need to download it within a couple of hours of it being posted.
http://www.reddit.com/r/usenet/wiki/providers
is good to look at to see who runs who.
Ah ok, so it's not the connection then, it's the file?
I moved from tweaknews to eweka.nl a while ago and not had any problems.