html form: using sql row for select option

Hi, I have the following code and I want it to show a dropdown list from slq rows. However, it does not work. How should this be formatted?
Thanks

 
<?php
include('config.php');
$query = "SELECT * FROM subcategories ORDER BY cat_id ASC";
$result = mysql_query($query) or die('Sorry, could not access the database');
mysql_num_rows($result);
$subcat_id = $row['subcat_id'];
$subcat = $row['subcategorie_name'];
$cat_id = $row['cat_id'];
?>
<form action="addchan2.php" method="post">
 <select name="subcat">
 <?php while($row=mysql_fetch_array($result, MYSQL_ASSOC))
   {
       $cat = $row['cat'];
     echo "<option value=\"$subcat\">$subcat</option>";
   } ?>
 </select>
<input type="text" name="chan">
<input type="text" name="subcat_id" value="<?echo"$subcat_id";?>">
<input type="text" name="cat_id" value="<?echo"$cat_id";?>">
<input type="submit" value="Add">
</form>

PHP:

 

oh, nevermind, i had to add the arrays after the while statement