I have Started the Remote desktop Admin (VNC) from Yast and Open the Firewall

i am tring to connect to the openSuse (GNOME) from my windows through tightVNC viewer

it ask for the Authentication for the color managed device i gave the root password

then i can see the SUSE login screen,
i selected "not in the list?"
entered the "root" as user name
and as i press enter it say "Authentication error"

i have one more user called "Admin"
if i select the "Admin" its not taking password and says "Authentication error"

did i miss any configuration?