You MUST NOT use www. with loki, ragtime, dharma and help.

The internet domain of the Mudcat cafe is mudcat.org

www, ragtime, loki, dharma, shorty and help (and maybe some more, only God and Max know) all are subdomains (btw, shorty and www end up on the same computer).

But there are no sub-subdomains www on these machines, so www.loki.mudcat.org does not exist, neither do www.www.mudcat.org, www.ragtime.mudcat.org, www.dharma.mudcat.org ...

www is just the most commonly used subdomain for http-Server.