sub-domain mapping question

[jaredatch]

I have a question about trying to map a subdomain to a WordPress multisite install.

Here is the scenario:

www.jaredatchison.net is my primary blog, setup to use subdomains.

I have jaredatchison.com parked on top of jaredatchison.net (cpanel), everything works great.

Question is, now I want to setup a subdomain for a domain I already have parked (jaredatchison.com)

I would like to setup tweet.jaredatchison.com to archive my tweets. I have created the blog in wordpress and currently it is accessible from the default address tweet.jaredatchison.net. I have already mapped the domain in WordPress, but something with the DNS is a no go.

I currently have a CNAME under the jaredatchison.com DNS entry, 'tweet' pointing to jaredatchison.com.

It just confuses me because I already had the one domain parked, so I'm not sure how to setup a subdomain.

Any ideas? :D