You appear to have a nested form on your page. That would probably screw things up.
Don't nest <form> elements within eachother.
rather than using javascript to submit the form, I would recommend just using a standard input type="submit" button.
There is quite a bit of javascript on the page there for validation. Do any javascript errors show up when you click the button?
What does happen when you click the button?
Nothing?
Navigates to an error page?
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