Form Thank You Redirect URL is giving Page Not Found result

As parents are completing one of our forms, they submit it and it says the page is not found.  However, I am receiving the submissions.  Not sure why?  

Hi,

The "Page not found" issue that was being reported by your form respondents was the result of the Thank You Redirect URL you have setup on the form http://www.jotform.us/form/22266953003146

After the form is submitted, the problem will be seen.

The redirect URL you have used 

http://www.osva.org/ourpages/auto/2013/8/13/55615724/ossm%20permission%20slip%20YEARLONG%20SLIP%202013-2014.pdf

indeed is a Page not found page (or it does not exist)

Please check your Thank You page on your website and make sure that the webpage exists or available.

OR you may just want to use the form's default thank you page or custom message thank you page for more simpler solution.

Check this user guide http://www.jotform.com/help/211-Setting-Up-the-Thank-You-Page

Hope this help, Inform us if you need more assistance.

Thanks!

Perfect.  Thank you!

You're most welcome. :0)