Unmodified Hello World Android Project in Eclipse is not getting run

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http://stackoverflow.com – I have programmed android applications before, I am using updated SDK and Eclipse Version: 3.7.2 and have set the path of SDK in Eclipse preferences.When I run a hello world application by following official Android Dev website, I get the following error. https://www.dropbox.com/s/7635ccv490un3ig/EClipse_error.PNG (Unable to post image because repuation is below 10, I kept a dropbox link to error) When I refresh the project, the error symbol would be there on the project root but not on any components.So I cleaned the project and run again and the same thing happens. I have checked the proj (HowTos)