Cookie not working

I’m trying to use this Plugin to hide a form that will only be visible after submitting the password. Here are the problems I am having.

After the password is entered and the form is revealed, if the user submits the form but for some reason misses a required field, the page refreshes (which is normal behavior of the form) but the form is then once again hidden. I tried using the cookie feature hoping that the form wouldn’t be hidden again after the page refresh, but that didn’t work. Also after the page refreshes and I enter the password to reveal the form again, the form fields that were filled out are empty again (not normal form behavior). I’m guessing since the form is being hidden again, going through the process of entering the password to make it visible, this somehow resets the form back to its default state.

Any ideas how to fix this? I really though that the cookie feature would do it. I set it to one hour, but it doesn’t work.

Thanks