We are getting problem with multi-db Plugin

We are getting Error with Multi-DB,

Image for the error.
http://content.screencast.com/users/Pankaj.A/folders/Jing/media/d11c138f-0175-46f4-904f-403f60b57d86/2012-09-12_1513.png

To see the error you have to just open the midfly.com

Is there some problem with the plugin.