Upload obrazku - chyba

<?

if ($_POST["upload"] == 1)

  { $upload = true; 

  $ADR = "upload"; 

    if ( !is_file($_FILES['SUBOR']['tmp_name']) )

    { echo "<span class=\"warning\"><p>Žiadny súbor nebol uploadovaný !!</p>";

    $upload = false; }

  else 

    { if ( $_FILES['SUBOR']['size']>500000 )

      { echo "<span class=\"warning\"><p>Súbor je príliš velký !!</p></span>";

      $upload = false; }

    if ( $_FILES['SUBOR']['type'] == "image/jpeg" )

      { echo ""; }

    else

      { echo "<span class=\"warning\"><p>Súbor musí byt JPG !!</p></span>";

      $upload = false; } } 

  if ($upload == true)

    { if ($_FILES['SUBOR']['type'] == "image/jpeg")

      {$pripona = ".jpg";}

    $NAZOV_SUBORU = 'SUBOR'.$pripona;

    if ( move_uploaded_file($_FILES['SUBOR']['tmp_name'], "$ADR$NAZOV_SUBORU" ))

      { echo "<p>Súbor bol uploadnutý :)</p>"; }

    else

      { echo "<p>Súbor sa nepodarilo uploadovat !!</p>"; } } } 

else

  { ?>

<FORM action="<? ECHO $_SERVER["PHP_SELF"] ?>" method="POST" ENCTYPE="multipart/form-data">

  <div align="center">

    <input type="file" name="SUBOR" />

    <input type="submit" value="Uploadovat" />

    <input type="hidden" name="upload" value="1" />

  </div>

</FORM>

<div align="center">

  <p>

    <? } ?>

  </p>

</div>