I'm trying to setup a networked MIDI connection over WLAN from my iPad to my Mac, as this guide describes. However, when I open Audio MIDI Setup and go to Window -> Show MIDI Window, then click Network, nothing happens. If I click again the MIDI Network Setup window appears, but I can't interact with it. It also has no drop shadow as windows in Mac OS usually have (see picture).
I really have no idea of what's wrong, can anyone help me out?