Domain Mapping is non-functional.

I have both the Domain Mapping and Multi-Domain plugins on. My central site (zysys.org) uses both. I check periodically to see if I can speed up access to these mapped domain and multi-domain sites and I found that all mapped domains are redirecting to zysys.org.

As you could imagine, this is a problem. The fix in the plugin is to disable:

define( 'DOMAIN_CURRENT_SITE', 'zysys.org' );
define( 'PATH_CURRENT_SITE', '/' );
define( 'SITE_ID_CURRENT_SITE', 1 );
define( 'BLOG_ID_CURRENT_SITE', 1 );

But by doing this, this stops the multi-domain plugin from working (and it didn't seem to yield any results on the domain mapping).

I uploaded a fresh copy of the domain mapping plugin in case it was corrupt and that didn't help.

Here are the sites to test:
Central Site: zysys.org
Mapped Domain: liebermanrealty.com
Mapped Domain: desertsax.com
Multi-Domain Domain: zysites.com/silververitas

The goal is, obviously, to have each site map to the correct content. I have no idea what is wrong with the domain mapping. Any ideas?