Since about Aug16, no new msgs appear in subscribed newsgroups (on my
ISP). No error msg is raised. However, if I subscribe to a group I have
never subscribed before, all msgs will download.
Msnews works fine - this seems to affect only my ISP's newsgroups.

I attempted Tools-...-Clean Up Now, to reset or delete a group.
I deleted the entire news account and recreated it.
I created a new identity and a new news account.
I installed the Thunderbird newsreader. The same thing happens when I
use Thunderbird - some groups show no msgs after Aug16.

I asked the ISP (netvigator in HK) and they couldn't explain it.

Is there a registry or other setting on my machine that could prevent me
from requesting msgs after a given date?

I think this happened once before and I managed to fix it, but I don't
remember how. It seems unlikely that my ISP stopped supporting all my
subscribed groups and no others, so it's likely something on my machine.

I ran an app called "CleanUp" (which deletes unused reg entries and temp
files) about that time, and I use Norton Internet Security, but I have
searched the web for months and can't find this problem mentioned.
Thanks for any help.