ruby - gem list shows knife-windows. But Fails when running the command knife bootstrap windows winrm -

i have chef client running in windows 7 machine , trying setup node chef workstation . installed knife-windows using rubygem , gemlist shows knife-windows (0.8.4)

but following failed. knife bootstrap windows winrm 10.x.x.x -x userid -p password warning: hostname containing 'windows' specified. please install 'knife-windows' if attempting bootstrap wi ndows node via winrm. connecting windows error: network error: getaddrinfo: no such host known. check knife configuration , network settings

checked winrm service , it's running , configured recommended here https://gist.github.com/jimcroft/3878113

what missing?