http error 500.19 - internal server error iis 7.5

1. Open web.config file and check properties for what all config sections are being set in web.config.

2. Then open inetmgr. At the server level, double click on "Feature Delegation" icon. Select the sections that you noted in step 1 and unlock them using the "Read/Write" action in the right pane.

3. While you are in inetmgr, convert your virtual directory to an application. Select your vdir in left tree view, right click and "convert to application"

Details.....
see link:http://forums.iis.net/t/1163129.aspx?HTTP+Error+500+19+Internal+Server+Error

http error 500.19 - internal server error iis 7.5

The requested page cannot be accessed because the related configuration data for the page is invalid.

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