Enable Additional Features not allowing saving of data.

This document:  http://www.southark.edu/employment/application-v5.pdf  was created a couple of years ago. 

I wanted visitors to have the ability to fill in the document and save their data.

So, I opened it in Adobe Acrobat X and saved it using the Save As > Reader Extended PDF > Enable Additional Features.

However, after filling in the document and saving, no data is saved. 

Thoughts?

Thanks,

Charley