Custom radio don't send value

Hi,
i wrote a custom radio list with the code of this thread, gform_pre_render upon previous dropdown condition?.
I use a multi-page form, but in $entry don't contain the radio value, but all of the other input value.
In my form render, in the html I get the good label and the correct value for the radio input.

in my $form i get my new populated choice

'choices' =>
    array (size=1)
      0 =>
        array (size=2)
          'text' => string 'custom title' (length=40)
          'value' => int 253

$current_page = GFFormDisplay::get_current_page($form["id"]);
 if ($current_page == 2)
{
 // my custom radio
}