Getting an Error The type or namespace name 'MySqlBasicInterface' could not be found (are you missing a using directive or an assembly reference?)

Question

Getting an error on MySqlBasicInterface mySqlInterface = new MySqlBasicInterface();

I found a script to get data in grid from mysql but when i am trying to do similar kind of code in my project this line is getting on my nerve -

In the working project and in my new project, this line looks like this -
http://i.imgur.com/hy2BR.jpg

whats the problem ?