redigere data

<?
if($edit == "yes") {

mysql_query("UPDATE tabel SET alias = '$alias' WHERE mbid = $id");

echo "Dit alias blev ændret.";

}
?>

<form action="?edit=yes" method="POST">
ALIAS:<input type="text" name="alias">
ID:<input type="text" name="id">
<input type="submit" value="opdater">
</form>

kan ikke få det til at virke, men her er hele det php script jeg har lavet.

<center>
<table border=0 cellspacing=0 cellpadding=1 width=75%>
<tr valign=top align=left>

<?
mysql_connect("10.0.0.4","root","0087");
$result=mysql("systems","select * from mailboks WHERE subdomain='$subdomain'");

$count=0;

while($row=mysql_fetch_row($result)) {
$mbid=$row[0];
$subdomain=$row[1];
$alias=$row[2];
$password=$row[3];
$mailboks=$row[4];

if ($count%2 == 0)

{
echo "<tr> <td bgcolor=#B5BDCE><DIV class=exp><h5><br>Login navn = &nbsp;<input type=\"text\" name=\"mailboks\" size=\"8\" Value=\"$mailboks\"><br>Password = &nbsp;&nbsp;&nbsp; <input type=\"text\" name=\"password\" size=\"20\" Value=\"$password\"><br>Alias = &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type=\"text\" name=\"alias\" size=\"10\" Value=\"$alias\"></h5></div><?
</td></tr>";
} else {
echo "<tr> <td bgcolor=#FFFFFF><DIV class=exp><h5><br>Login navn = &nbsp;<input type=\"text\" name=\"mailboks\" size=\"8\" Value=\"$mailboks\"><br>Password = &nbsp;&nbsp;&nbsp; <input type=\"text\" name=\"password\" size=\"20\" Value=\"$password\"><br>Alias = &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<form action=\"?edit=yes\" method=\"POST\"><input type=\"text\" name=\"alias\" size=\"10\" Value=\"$alias\">&nbsp;<input type=\"hidden\" name=\"mbid\ Value=\"$mbid\">
<input type=\"submit\" value=\"opdater\">
</form>
</h5></div></td></tr>";
}
$count++;
}

?>
</table>
<br><br><br><br><center><A HREF="java script:history.go(-1)"><-- tilbage til Menu--></a>
<?

if($edit == "yes") {
mysql_connect("10.0.0.4","root","0087");
mysql_query("systems","UPDATE tabel SET alias = '$alias' WHERE mbid = $mbid");

echo "Dit alias blev ændret.";

}

?>