Problem with Simple Modal login plugin

Hi,

I'm having a small issue with Simple modal login plugin. https://wordpress.org/plugins/simplemodal-login/

Since the plugin is no longer actively supported or developed I thought you guys could help me to resolve this problem.

Just recently I notice its Activity indicator (loading image) is not working anymore. Its just shows a empty modal box till the login gets completed. Is there a way to get The Activity indicator back?
https://s.w.org/plugins/simplemodal-login/screenshot-4.png?r=1407884

You can see this behavior in my site: http://bit.ly/1A7adyM click login to open the modal box and try to login with a demo user name.

Thanks.