How Do You Register for the Eastern APA Meeting?

Prof Kate recently asked,

I cannot seem to figure out how to register for the Eastern APA. I log on to apaonline. I click on the bright red "Register" link on the homepage, and it takes me to an 'events' page with this sort of calendar interface, as if I'm searching for flights, you know? So I enter the appropriate date range, and it prompts me for the city, and I type Washington. Then... then what? I click 'filter' but nothing happens. Friends, Smokers, frokers, please tell me what I'm doing wrong. (And DON'T say "you're using apaonline, is what you're doing wrong." Cuz I know, I know... I blame myself.)