problem in vnc to kvm

RouterOS Virtualization
1

hi
i have problem in connecting vnc to kvm, console is working and i am in local network so no firewall role need.
in vnc log we have this:
vncviewer[4792]: Child: CConnection: close: [EndOfStream] The connection closed unexpectedly.
vnc_problem.jpg

2

i used tight vnc viewer and problem solved.