Why aren't contacts from my WordPress plugin form being added?

I linked up the plugin to my Constant Contact account, created the form, and embedded it. I have First Name, Last Name, and Email. 

When people fill out the form though, they're not getting any email from Constant Contact to opt-in, and I'm not seeing them in the back end.

I've clicked the checkbox to bypass the wp-cron.

Is there something obvious I'm missing?