Not creating pdf file

Are you please be more specific? If you are trying to create fillable PDF please read this guide to find out how to do it: http://www.jotform.com/fillable-pdf-form-creator/

http://www.jotform.com/help/312-Fillable-PDF-Everything-you-need-to-know-about-JotForm-Fillable-PDF-Creator 

Or you are trying to create PDF report of your submissions? To create PDF report select your form and click on Submissions option.

Then simply click on Get PDF option.

Inside of this article you can find out how to partially download form submissions as Excel/CSV/PDF:

http://www.jotform.com/help/73-How-to-Partially-Download-Form-Submissions-as-Excel-CSV-PDF 

If you have some other issues, please explain in more details your issue.

Hope this will help. Let us know if you need further assistance.