angularjs – Problems running $ ionic serves

Use of Windows 7, 64 bits. I did all the installation of node.js, Cordova, java, ionic ..
And it creates the right project, but when I try to execute $ ionic serves says that the server has been opened in that runs in the browser does not open anything .. Yes, I have already tried to change the address but it still continues to persist in the problem .. Thank you in advance for the help!