Cannot make a call from contacts

I have a problem with making calls from Contact app in OS X. The 'FaceTime' row is grayed out (and I cannot make any call clicking to the phone shaped button in that row), but in the right side of the phone number row there is a phone button. If FaceTime app is running and I click that button FaceTime is initiating a call otherwise not.

Can anyone tell me why? It is very confusing... From my previous MacBook Pro I don't have problem making calls from Contact app...

Thanks in advance :)