PHP, HTTPS, Form submit

We have recently switched to HTTPS and when submitting one of our forms, Firefox pops up:

Although this page is encrypted, the information you have entered is to be sent over an unencrypted connection and could easily be read by a third party.

Are you sure you want to continue sending this information?

After saying Yes, the form submits and the page just开发者_JAVA百科 reloads, the information isn't actually posting?

Am I missing something?

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Basically, it means:

<form action="http://www..."

has to be changed to

<form action="https://www..."

As we are not submitting to a secure URL.

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Your form action is posting to http not https

// edit, just saw your comment. sorry.