Success Page after form submission not loading

Success Page after form submission not loading

Hello- currently after a user submits the form. It flashes a Success message very fast, closes the msg by itself, and goes back to the form-leaving users confused if the form actually was submitted properly.
Here is what I have at the bottom of On Success

After Sendmail I have:


thisapp.calendar.updateAllDataField(input.ID, input.formdata);
success message "Thank you! Your booking request has been sent!";
openUrl("http://www.xxxyyyzzz.ca/form/success.html", "popup window", "height=100,width=100");

But the window does not load.