Can not log-in to ubuntu server

I just installed the new ubuntu server ROM, but first boot it is asking me to log-in… I can write login “root” and press enter, but where it is asking to password I can not write anything. I mean if i’m pressing the buttons nothing happening, except enter button, if I press that it shows that “login incorrect”…

What can be the issue?

Ok I am noob… :smiley: It is writing password, but not show anything like *****