Thanks for your reply Andrea,
I am getting following message
HTTP Error 500.19 - Internal Server Error
The requested page can not be accessed because the related configuration data for the page is invalid.
Detailed error information:
Module : Custom Error Module
Message : Send Response
Handler : StaticFile
error code : 0x800700b7
Configuration : You can not duplicate mimeMap collection item with unique key attribute 'fileExtension' set to '.ogg'
configuration : \\? \ web.config
Requested URL : http://SiteURL/Styles/Site2.css
Physical path : C: \ \ Styles \ Site2.css
login Method : Anonymous
Logged in user : Anonymous
Configuration Source:
6: <staticContent>
7: <mimeMap fileExtension = ".ogg" mimeType = "audio / ogg" />
8: </ staticContent>
More information:
This error occurs when you are reading the configuration file for the web server or web application. The event log may contain more information about the cause of the error.