Conflict with WordPress MU Domain Mapping by Donncha O Caoimh

Hi,
Once I installed WPMU plugins, WordPress MU Domain Mapping plugin by Donncha O Caoimh stopped working asking "Please edit your /var/app/current/wp-config.php and move the line define( 'SUNRISE', 'on' ); above the last require_once() in that file or make sure you updated sunrise.php." when it's still in wp-config.php.... WordPress MU Domain Mapping is the only plugin that allows me to use CNAME records for domain names. Since I am on AWS with ELB and constantly changing IP addresses, using CNAME records is my only option. The big drawback to WordPress MU Domain Mapping is the lack of easy UI to manage many domains... I want to use both, WordPress MU Domain Mapping & Domain Mapping and/or Multidomains and/or Pro Sites. But if the later 3 don't include CNAME mapping then I can't use them. And also.. the big issue for me here is something conflicting with WordPress MU Domain Mapping preventing it from working. Thank you.