I upgraded to 3.9 as prompted. In doing so it deleted my custom login.PHP CSS it was done with a5 custom login plugin. So I decided to use WPMU's custom login which is found on your site here https://premium.wpmudev.org/blog/create-a-custom-wordpress-login-page/
I have followed it to the letter but stopped after trying to place an image, the attempt to change the color background did not work
I created a "login folder" and placed in the code provided, I also placed the code provided for the functions.PHP file. The login page did not not change. It is still there so that I guess is a good sign but why will nothing change no color no logo. If someone could help that would be great.