Domain Mapping and Sunrise.php


I am having difficultly setting up the domain mapping.

I've installed the plugin and have added the necessary line regarding Sunrise to the wp-config file.

I now get the following warning:

Warning: include_once(/home/content/16/11915416/html/wp-content/sunrise.php) [function.include-once]: failed to open stream: No such file or directory in /home/content/16/11915416/html/wp-includes/ms-settings.php on line 18

Warning: include_once() [function.include]: Failed opening '/home/content/16/11915416/html/wp-content/sunrise.php' for inclusion (include_path='.:disappointed:usr/local/php5_3/lib/php') in /home/content/16/11915416/html/wp-includes/ms-settings.php on line 18

I am unclear on how to proceed. Thank you