Creating a database of users that upload

Hi,
I’m trying to upgrade the plugins capabilities by adding a form that asks for all the user info before they upload the file to dropbox. I’m really close to making it work, but there’s still something going wrong. If I place an action parameter in the form that holds the submit button, pointing to the thank you page after uploading, and in that page I have a sql statement that inserts into my database, it works, but no file is uploaded. If I leave the form tag without the action parameter, I can upload the file, but nothing is written in the database, because the post array appears empty.

I need to understand what action is currently running when you press the submit button, and see why when it does, the parameters in the form that I created don’t pass through the POST method.

What do you think that can be done. I would gladly share my code with you if you can help me out with this issue. Thanks !

https://wordpress.org/plugins/simple-dropbox-upload-form/