Error message from Admin/Settings/Domains

I Had Domain Mapping previously setup with the generic WP wordpress-mu-domain-mapping plugin and it was working fine

Installed WPMU Domain Mapping plugin and Multi-domains plugin (haven't done anything with the Multi-domain functionality ... yet, but need to very soon)

The mapped domains still work fine for the visitor, They show up in the site list. I can get to and use the dashboards on them.

But anytime I try to go to

Network Admin
Settings
Domain Mapping
-or-
Domains
I get the following error:

Please edit your /home/dmerriam/public_html/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.

Checked, double checked and triple checked. sunrise line is in the right place and uncommented, sunrise.php is in the right place

I've run out of ideas to try

Thanks in advance,
Diane Merriam