No Error When Not Filling Out Required Forms

I am not optimistic this will be responded too considering almost no other requests have been but it’s worth a shot I guess.

When submitting this form, if someone doesn’t fill out a required form they aren’t getting any sort of error message. It just blanks out which most are taking to mean their form was submitted when it isn’t.

I’d love to upgrade to Gravity Forms but if this very basic feature doesn’t work, why would I?

http://wordpress.org/extend/plugins/custom-contact-forms/