code completion for liftweb scala in intellij idea

Question

I'm working with a Scala application using Intellij Idea 13.1.1 community edition. Although i am able to compile and run my application, but the IDE shows error in editor window as it cannot resolve the class. How can i remove that and enable code completion feature for Scala and Liftweb?

Answer 1

Now I found the solution thanks to joescii. While importing a project import using build.sbt