Help!!!

This is driving me absolutely nuts!!!  I have a page that has
some checkboxes that will cause a database update for the selected
items.  This page is a self referencing form page that never seems to
work.  I have no idea what I am doing wrong.  Here are the code portions
that I think are relevant.

This is the top of the page here:
<?php
while(isset($entry[0])) {
$redir =3D "set";
$tmp =3D $entry[0];
$update =3D "UPDATE accounts SET ctime=3DNOW() WHERE =
id_sys=3D'".$tmp."'";
$results =3D mysql_query($update, $Prod) or die(mysql_error());
array_shift($entry);
}
while(isset($all[0])) {
$redir =3D "set";
$tmp =3D $all[0];
$update =3D "UPDATE accounts SET ctime=3DNOW() WHERE =
id_sys=3D'".$tmp."'";
$results =3D mysql_query($update, $Prod) or die(mysql_error());
array_shift($entry);
}
if (isset($redir)) {
header('Location: link address');
}

$SBCUID =3D $_GET['SBCUID'];  < This is the point at which some queries
build the page content
<<... Lots of stuff clipped ...>>
<Here is the guts of what builds the check
boxes.  Everything displays properly>
<form method=3Dpost action=3D"user_details.php">
<?php while ($list2 =3D mysql_fetch_assoc($requests_accounts)) {
$all[] =3D $list2['id_sys']; ?>
<tr bgcolor=3D"#CCCCCC">
<td><div align=3D"center"><?php echo $list2['system']; ?> 
</div></td>
<td><div align=3D"center"><?php echo $list2['gid']; ?> 
</div></td>
<td><div align=3D"center"><?php echo $list2['shell']; ?> 
</div></td>
<td><div align=3D"center"><?php echo $list2['rtime']; ?> 
</div></td>
<td><div align=3D"center"><?php echo $list2['atime']; ?> 
</div></td>
<td><div align=3D"center"><input name=3D"entry[]" type=3Dcheckbox
value=3D<?php echo $list2['id_sys']; ?>></div></td>
</tr>
<?php  } ;?>
</table>
<div align=3D"center">
<input type=3Dsubmit value=3D"Update"><input name=3D"all[]" =
type=3Dsubmit
value=3D"Update All">
</div>
</form>

The initial load of the page displays everything properly.  The
problem is when I hit the "Update" or "Update All" buttons the page
reloads, but never actually makes it into the database update loops.  I
cannot figure out what I am doing wrong here.  I have used this kind of
code before and I am at a complete loss as to the problem.  Please help
so I can actually get past this and onto some realy work.  Thanks in
advance.

Scott Nipp
Phone:  (214) 858-1289
E-mail:  sn4265@sbc.com
Web:  http:\\ldsa.sbcld.sbc.com