JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
If you made changes to your form they should be reflected automatically on your facebook page. If you want to use a different form then you would need to re-embed it following the steps provided here: http://www.jotform.com/help/22-Adding-Form-to-Facebook-Pages
Let us know if this helps.