won't redirect

This plug-in is basically great! (I’d like more flexibility– like multiple selections in drop-downs, custom CSS for the form, etc., but you know what they say: “if wishes were horses…”)

meanwhile, the plug-in appears to have a feature to present a confirmation then to redirect to another page. I have checked the box for “enable” and selected a page in the drop-down, but it doesn’t redirect. What should I do?

https://cocktailscatering.com – questionnaire

Thanks!