Subdomains from different domains

I am trying to set up multiple sub-domains with this set up.

media-kit.compactequip.com
media-kit.xxx.com
media-kit.ccc.com
media-kit.etc.com

I set up my DNS to *.compactequip.com and it points to my server. I get the default plesk screen. But It will not go to the new site I set up. My may install is under media-kit.benjaminmedia.com.

Thanks, Mark