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I did check your web page where you have embedded your form. It seems you have used your form's script code to embed it in wix site.
I would suggest you to use the following iFrame embed code in your wix website:
<iframe id="JotFormIFrame" onload="window.parent.scrollTo(0,0)" allowtransparency="true" src="//form.jotform.us/form/42386120501140" frameborder="0" style="width:100%; height:835px; border:none;" scrolling="no"></iframe>
You may also like to take a look at the following guide on how to embed form in wix site: http://www.jotform.com/help/70-Adding-a-form-to-Wix-Site
Hope this helps.
Do get back to us if you have any trouble.