app not working when deployed through modifying hosts file

I followed the below article for deploying asharepoint hosted  app. According to the article, i modified the local hosts file instead of DNS entry. Iam able to deploy the app but when i open the app link it is showing a blank screen. 

http://theblobfarm.wordpress.com/2012/08/28/creating-a-development-environment-for-sharepoint-2013-part-ii/

Following is the screen shot: