Submit button issue

Hi, I am using your MailChimp plugin. I have configured it so that the sign-up form is in my sidebar. The site is http://ericyoffie.com. The way it is set up, when someone clicks Submit, a message appears at the top of the form that says: “Success, you’ve been signed up! Please look for our confirmation email!”

I would like the Submit button to take them to the “Thank you” page that I created on my site (http://ericyoffie.com/subscribe) and I want to suppress the “Success” message.

I know how to do a redirect to the thank you page, but the Submit button doesn’t take me there.

Please note that I do want the error messages that appear when someone fills out the form incorrectly or is already a subscriber to still be on the top of the form. It’s only when a person correctly completes the form and clicks Submit that I want the redirect to the Thank you page. Thank you!

https://wordpress.org/plugins/mailchimp/