Form suddenly not submitting - possible causes?

My student registration form is now not submitting. As in I click the 'Submit' button and absolutely nothing happens. No errors of any kind are returned. The only thing I have changed is the query. I changed it from INSERT INTO table to INSERT table SET. I don't think this is the issue though, as INSERT table SET is working on the Add Course page. I'm stumped and becoming more 'moedeloos' by the moment because there are other things I should be focusing on right now. This is the one page that, for some reason, has decided to give me nightmares.

It might be an error with your form tag,

Make sure you have a action and method attributes on the form and that your submit button is within the form.

student no: 77315138

Sorry fionam,

Are you using " INSERT table SET " ?

it suppose to be UPDATE table SET

student no: 77315138

Use error checking - echo what was sent or own sentences like "yeah it works up until here!" to pinpoint where the code breaks down.