Make sure the default Apache virtual host points at your WordPress MU site so it will handle unknown domains correctly. (Need info on cpanel, etc. How do you get them to respond to any domain?)
I use my server with example1.com domain.
And I use wpmu on example2.com domain.
Is there any other way, so I can keep using example2.com domain to run this domain mapping plugin properly?
http://wordpress.org/extend/plugins/wordpress-mu-domain-mapping/
