HTTP Error 500.19 - Internal Server Error iis

When i started to work IIS 7.0 in vista . I got an error HTTP Error 500.19 - Internal Server Error iis. I checked with the IIS features(control panel -> programs and Features -> Turn windows features on or off ) There the Internet Information Services -> World Wide Web -> Services Application Features are not selected. When i selected as shown in the below image.Now evey thing is working.


Note : World Wid Publishing Service - provides web connectivity and adminstration through the internet information Service Manager

My problem got solved . Now every thing is working.