New field in 'orders' table - how to insert

[mlodyno]

Hello,

I added new field to mysql orders table - its named "fv" field. I want to add value from a checkbox which is placed in Order-Address-page (checkbox is placed on page where you can specify address to invoice). Unfortunately I can not insert any data to "fv" field in database. I pasted some codes into class Order.php but without positive results.

//new in Order class
public        $fv;
protected    $fieldsValidate = array(........ + 'fv'=> 'isMessage')
$fields['fv'] = pSQL($this->fv);

If I put simply

public $fv=1;

then '1' will be added to database. It seem that variable from Order-Address-page it is not transfer to last 'Confirm Page'.

Please Help me. Where should I put code to add data from 'fv' variable?

Best Regards