Ubuntu MATE log on screen

Hey guys I have been trying to change my log on screen from Ubuntu MATE 16.04.1 LTs and cant seem to make it work. my log on screen looks like an old PC with very bad graphics. I have tried using LightDM GTK + Greeter settings but to no avail. I am new on Ubuntu and don't know what else to try. please help me. Thanks
attached please find link to a screenshot of the log on screen.

I’ve moved your image to imgur so it’s easier for people to actually see it.

This greeter design looks like the stock greeter for Ubuntu 8.04 LTS, are you sure you used the correct .iso for your installation?


In Control Center -> LightDM GTK + Greeter settings choose:

Theme: Ambiant-MATE
Icons: Ambiant-MATE