[Plugin: TinyMCE Advanced] Link to Page

Can’t link to internal pages anymore. I’ve used this plugin in the past for many other clients, now all of a sudden, I don’t have the ability to link to internal pages. I keep getting a pop-up window that asks me for the URL as oppose to the screen that use to ask me if I wanted to link to already created page. How do I get that option back?

http://ww.wp.xz.cn/extend/plugins/tinymce-advanced/