how to activate this childtheme?

hi
i try to download child theme and upload to wordpress. and i change the header of style.css

/*
Theme Name: TechFlow – PremiumPress Child Theme
Theme URI: http: //www.premiumpress.com
Description: This is a child theme for the PremiumPress responsive framework.
Author: Mark Fail
Author URI: http: //www.premiumpress.com
Template: TechFlow
Version: 1.1
*/

/* =Imports styles from the parent theme
————————————————————– */
@import url(‘/wp-content/themes/TechFlow/style.css’);

and i got this error message when i activate this themes
The active theme is broken. Reverting to the default theme
anything wrong? thanks