i am new to Yii. I am trying to setup a yii 1 app and i get this error.

"Application runtime path "C:\xampp\htdocs\gfs\_design\protected\runtime" is not valid. Please make sure it is a directory writable by the Web server process."

I am using Xampp and the frontend and the yii folders are in my htdocs directory.
What I Have Done:

1. I have made the Yii folder writable from properties\security\advanced and so on

But i still get the error.

Can any one help?