Sencha extjs Framework giving 500.19 on IIS 7

i get the following error when I configure the extjs (Sencha) framework in IIS 7. I have Anonymous and Windows authentication enabled. I've tried without either. And I've also tried just anonymous. What could be th开发者_开发知识库e issue?

HTTP Error 500.19 - Internal Server Error The requested page cannot be accessed because the related configuration data for the page is invalid.

Requested URL http://localhost:80/index.html Physical Path

Logon Method Not yet determined Logon User Not yet determined

Had to give permission to the root folder to the user group IIS_IUSRS.

I added permissions for USERS , Authenticated Users and Network Service. and it solved the problem.