So I checked out that page, and the first thing I'm noticing is that the section with that form is being hidden. Is it hidden because the event tracking isn't working? Regardless, looking at the page's source code I can see that the Google Analytics code you have installed creates a tracker that is named __gaTracker instead of the traditional ga. Can you update your form embed code's onFormSubmit function to call __gaTracker instead of ga?
Where is that code located? Is that placed before the GA initialization script? Can you send me a link to the page in question so that I can do some testing?