vnc windows remote connection ubuntu14.04

First complete the following steps on ubuntu
1. sudo apt-get install xrdp
2. sudo apt-get install vnc4server
3. sudo apt-get install xubuntu-desktop
4. echo "xfce4-session" >~/.xsession
5. sudo service xrdp restart

and then "window key + R" on windows7 to
open the "run dialog" --> enter "mstsc" --> enter --> enter the IP address of the Ubuntu host --> "connect"
prompts for a username and password just ok