IIS error, Unable to start debugging on the webserver?

IIS error, Unable to start debugging on the webserver?

I want to run my application from IIS on my local machine,i created the
virtual directory and added the application to it and in the properties
folder of the application i checked the radio button 'Use Local IIS
Webserver'...And then i started running my application but im getting the
below error..
Unable to start debugging on the webserver.see help for common
configuration errors.Running the webpage outside of the debugger may
provide further information.
Make sure the server in operating correctly.Verify there are no syntax
errors in web.config by doing a debug.Start Without Debugging.You may also
want to refer to the ASP.NET and ATL Server debugging topic in the online
documentation.
How can i get rid of this error?
Im using visual studio 2010 on windows 7 and IIS Version in 7.5