Google drive - unable to connect

I use Google for Work (paid version of Google apps) but having issues with Google Drive Mac Client app. I downloaded the app at; https://www.google.com/drive/download/ after I reboot my Macbook pro,google drive starts but after few minutes later it stops and the Drive icon greys out and it gives "unable to connect" error. screenshot at; http://www.screencast.com/t/SvSaZR5p9nF

has anyone able to use Google drive sync client on mac? or is it only me?

Need your advice, Thanks.