If both the physical connection and the IP configuration are correct, go to the QUICK CONNECT menu (via CONNECT button for the respective address book entry (here: entry 2 for VNC)
or use the TEXT CONNECTION button in the CONNECTION DETAILS menu
to establish a connection with the VNC server.
The way this connection is established depends on the settings of the VNC server and can either by
•a direct connection without asking for a password
•a conneciton with VNC password
•a conneciton with Windows password