File Upload option isn't working

Hello, on our form our "File Upload" option isn't working. We placed this on our form, but when people click it nothing happens. It doesn't prompt a file selection screen. Please help. 

Most probably a style issue.

Please inject this CSS codes to your form. This should fix it.

.inputContainer {overflow: visible !important;}

Guide: http://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes

There's also a security issue with your form due to the old form theme used. Please apply the new version of the theme in your form. Here's the theme URL https://www.jotform.com/theme-store/theme/big-blue-new.

Thanks