Getting error when running the script with just driver

Hi , when ever I trying to run the Junit script on eclipse it prompts me an error. I have launched the server.
I am using - “http://http://127.0.0.1:4723/wd/hub/” in the script ( Browser shows - That URL did not map to a valid JSONWP resource ). Need help what do in the following error.

org.openqa.selenium.remote.UnreachableBrowserException: Could not start a new session. Possible causes are invalid address of the remote server or browser start-up failure.

Build info: version: ‘2.45.0’, revision: ‘5017cb8’, time: ‘2015-02-27 00:00:10’

System info: host: ‘N/A’, ip: ‘N/A’, os.name: ‘Mac OS X’, os.arch: ‘x86_64’, os.version: ‘10.10.1’, java.version: ‘1.7.0_45’

http://http://127.0.0.1:4723/wd/hub/ contains duplicated scheme