Contact Form 7 Not displaying response message on successful send of message

I’m displaying a Contact form on my page http://www.pureweddingphotos.co.uk/wedding-photography-packages/
and basically I’m not having successfully sent message shown to the user after a successful message send (which means I’m getting multiple emails from potential customers constantly!)

I’m reckoning it’s something to do with the fact that I’ve put it in a toggle display box, I used Contact Form 7 (rather than my normal submit form, because it doesn’t refresh the page, which hides the contact form and resulting message after submitting)

Any ideas would be gratefully appreciated.

Thanks in advance.