Radio buttons! Can someone please help?

I'm developing in PHP/MySQL. I've created a form consisting of a userID text form field, a RadioButtonGroup (3 radio buttons) and a submit button.

The idea is to populate the MySQL database with the data entered by the user. The problem I'm experiencing is that the radio button choice that the user selects is never entered correctly into the database: either all '0' or all '1'.

I would love to add the code here and an example of what the database structure looks like, but I don't even know how to do that! Could someone out there please reply?

Thank you.