[PHP] Don't get variable to be passed to the page on submit

[Davíð Örn Jóhannsson]

I have this code whitch I have been staring at for hours and I just
can’t figure out what is going on...
 
it is about as simple as it gets I just need to pass a variable from
this page to it self, and that would be tha variable $nafn
 
I have this included code included into another page that is why I use
the aAction and sAction variables in the from action
so the script knows where to go after submiting. I have done similar
things on this site I’m working on an that works but this
i just can’t get to work.
 
It is prob. just somthing silly and wery eazy but I could use some
assistance to finde out what.
 
Regards, David
 
<?php
 
if(!isset($submit)){
session_register("nafn");
?>
<form action="<?php echo
"$PHP_SELF?aAction=$aAction&sAction=$sAction&submit=1&test=test"; ?>"
method="post" enctype="text/plain" name="form">
 
  <table width="450" border="0" cellspacing="0" cellpadding="0">
    <tr> 
      <td>Nafn yfirflokks:</td>
      <td><input  type="text" name="nafn" id="nafn"></td>
    </tr>
  </table>
 
  <p>
    <input type="submit" name="Submit" value="Vista flokk">
  </p>
</form>
<?php
}
else{
print($test);
print($nafn);
            $newQuery = "INSERT INTO $db_imgCat (catName, subCat) VALUES
('$nafn', 0)";
            if(mysql_query($newQuery, $db) or die(mysql_error())){
                        print("Flokkur vistaður");
            }
            else{
                        print("fail");
            }
            
}
?>