cannot login after I setup Domain mapping plugin

I setup the domain mapping plugin as per the instructions on this page

https://wpmudev.com/project/domain-mapping/?ht2=1&utm_expid=3606929-52.ZpfeUjXqSWOCaoohIqoFQQ.1#product-usage

After that, when I logout and try to log back in, I am not able to get in. It keeps showing me the login screen though I enter the correct user/paswd.

The only way was for me to log back in was to comment out

define(‘SUNRISE’, ‘on’:wink:;

Right now, I have it uncommented, so I am unable to log back in.

Please help.

Sri