Hi, I have done a plugin conflict-test and found out that the only plugin causing problems for Media Library Plus/aka MLP is Twitter Feed/aka TF. All plugins are deactivated, exept TF and MLP, even changed the theme to WP
Then when using MLP who is using jQuery UI library and TF is activated the jQuery UI library is not loaded and, as I understand, this is causing a JavaScript error and not allowing the rest of the JavaScript code to execute.
If the site runing normaly, all plugins activated and so on, it is only TF that making problems. Deactivating TF and MLP works normaly.
Hope this is helpfully and explains why I think it is Twitter Feed that causes the problem.