Shortcode for redirect

I am trying to redirect people who fill out my sign up form to a thank you page. I have tried using the shortcode instructions provided with no luck.

Here is the code I used:
[constantcontactapi formid=”1″ redirect_url=”http://www.stellaadler.la”%5D

The form works fine but will not redirect. Any thoughts? Am I writing the code wrong?

Thanks.

https://ww.wp.xz.cn/plugins/constant-contact-api/