[Plugin: Google Calendar Events] Adding events

I have tried a bunch of calendar plug-ins that have all been disappointing. This one is so close to what I want visually and function wise. I’m sorry if I am missing something obvious but I can’t figure out how to add events. I tried to do it while creating a post as laid out in the instructions, but it won’t show up on the calendar. Can anyone give me any tips?

I don’t see anything that resembles the “User Interface” shown in the instructions here anywhere: http://docs.dhtmlx.com/doku.php?id=dhtmlxscheduler:external_plugin:wordpress

How do I view that?

Thanks