Update Records Script - Messed up, can you please help

[The_MA]

Hi - This is my script and this is the way it works:

1) User views records - checks a record to update - submits
2) User taken to form to edit record - submits form - records updated

Simple. But, it doesn't work and I don't understand why... when I press Update in the form I am simply taken back to stage 1) and the record has not been updated...

Thanks.

<?php 

$conn= mysql_connect( "localhost", "a", "b" ) or die (mysql_error());

$db = mysql_select_db( "rugby_project", $conn) or die (mysql_error());

if (isset($_POST['update']) && isset($_POST['upboy'])) { 
   $delstring = ''; 
   foreach ($_POST['upboy'] as $val) { 
      $delstring .= "'" . $val . "',";  

   } 
   $delstring = rtrim($delstring, ','); 
   $delquery = "SELECT * FROM phone_numbers WHERE userID IN (" . $delstring . ")";   

   $result = mysql_query($delquery) or die("Could not Edit User"); 
   $row = mysql_fetch_array($result);

if ($result) 		// If the checkbox next to a record has been checked then it goes to this form to update that record:
  { 

$self = $_SERVER['PHP_SELF'];
$userID = $_POST['userID'];
$number = $_POST['number'];
$password = $_POST['password'];

if( (!$userID) or (!$number) or (!$password) )
{

  $form ="<table width=\"271\" border=\"1\" align=\"center\" cellpadding=\"1\" cellspacing=\"1\" bordercolor=\"#000000\">";
  $form.="<tr bgcolor=\"#CCCCCC\"><td colspan=\"2\"><font size=\"1\" face=\"Verdana\"><center>";
  $form.="Please Update Current User Details";
  $form.="</td></font>";
  $form.="</tr><tr>";
  $form.="<td><font size=\"2\" face=\"Verdana\"><form action=\"$self\" name=\"adduser\" onsubmit=\"return valupdate()\"";
  $form.=" method=\"post\">Username:</td>";
  $form.="<td><input type=\"text\" name=\"userID\" value=\"{$row["userID"]}\">";
  $form.="</td></tr><tr><td><font size=\"2\" face=\"Verdana\">Number:</td>";
  $form.="<td><input type=\"text\" name=\"number\" value=\"{$row["number"]}\">";
  $form.="</td></tr><tr><td><font size=\"2\" face=\"Verdana\">Password:</td>";
  $form.="<td><input type=\"password\" name=\"password\" value=\"{$row["password"]}\">";
  $form.="<tr><td><font size=\"2\" face=\"Verdana\">Password:<font size=\"1\" face=\"Verdana\"> repeat&nbsp;</td>";
  $form.="<td><input type=\"password\" name=\"password2\">";
  $form.="<tr><td colspan=\"2\"><center><input type=\"submit\" value=\"Update\">";
  $form.="</tr></table></form>";
  echo($form);

}
else
{		// When Update is pressed the UPDATE query is run:

  $sql = "UPDATE phone_numbers SET userID='$userID',number='$number',password='$password' WHERE current_record_id='$current_id";

  $result = mysql_query($sql,$conn) or die (mysql_error());
  if($result)
  { 
echo( "The Details of $userID have been Updated" );
  }
}

  } 
} 
else 		
{ 

// This is the first table the user sees: Here they can check a box next to record to update it using the form above ^

$sql = "select userID, number, password from phone_numbers order by userID"; 

$rs = mysql_query( $sql,$conn); 
$self = $_SERVER['PHP_SELF']; 
$rows = mysql_num_rows($rs); 

echo( "<table // header etc etc.... //

if(mysql_num_rows($rs)) 
{ 

echo( "<form name=\"viewuser\" method=\"post\" action=\"" . $self . "\">" );

while( $row = mysql_fetch_array( $rs ) ){ 
   $userID=$row["userID"]; 
   $number=$row["number"]; 
   $password=$row["password"]; 
   echo '<tr><td><font size="2" face="Verdana">' . $userID . '</td>'; 
   echo '<td><font size="2" face="Verdana">' . $number . '</td>'; 
   echo '<td><font size="2" face="Verdana">' . $password . '</td>'; 
   echo '<td><center><input type="checkbox" name=" upboy[] " value="' . $userID . '" /></td>';    

} 

echo '<tr><td colspan="4"><center><input type="submit" name="update" onclick="validate();" value="Edit"/>&nbsp;<input type="reset" name="reset" value="Reset" /></td></tr></form>'; 

} 
else 
{ 
echo( "This table has no records yet" ); 
} 

} 

?>