Non ne do fuori!!!!

per favore aiutatemi....
vi posto il codice
Codice PHP:
include "settings.php"; /*Inclusion of the config file*/
if ($a<>'1')
{
?>
<FORM METHOD="Post" ENCTYPE="multipart/form-data" ACTION="index.php">
<input type=hidden name=a value=1>
<?
$k=1;
while ($k<=$up)
{
?>
File <?=$k?>: <INPUT TYPE="file" NAME="file<?=$k?>">
<?
$k++;
}
?>
<INPUT TYPE="submit" value=UPLOAD></FORM>
<?
}
else
{
$k=1;
while ($k<=$up)
{
echo "$c File $k";
$t=$_FILES["file$k"]['tmp_name'];
$sz=$_FILES["file$k"]['size'];
$n=$_FILES["file$k"]['name'];
if ($t=='none')
{
echo ": $err1";
}
elseif ($sz>$s)
{
echo ": $err";
}
else
{
echo " ($n): ";
copy($t,"$d$n"); /* Copying the file */
echo $ok;
}
echo "
";
$k++;
}
echo "
<a href=\"index.php\">$back</a>";
}