As per instructions on the developer's page, all settings are done correctly, API, list ID, etc, but not getting the BigMailchimp adds a new meta-box in post/page edit page alongside of your WYSIWIG editor. Checked screen options, and bigMailchimp is checked.
further, the short code doesn't work. When I didn't see the meta-box, I inserted a short code as outlined, replacing the # with 0,1,2, etc, but nothing.
Please help. I need to display my list on a page, and yours is the only plug-in I have found that does that.
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[bigmailchimp list_id="#"]
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