If you mean uk.music.folk it's a newsgroup and depending on your software/ISP you may have to set newsgroups up specially (usually there's some facility to get a list of supported newsgroups and then select the ones you want to subscribe to). You may also be able to access it via the URL news://uk.music.folk.

Failing that you can always look things up at Google's Deja News, selecting uk.music.folk in the newsgroup box.

Mick