I've set up a simple search form but on POST it get's no result, I've tested it with data I know is definitely in the database, not sure what I am doing wrong...

Search Form
Code:
<html>
    <head>
        <title>Search Test</title>
    </head>
    <body topmargin="0" leftmargin="0">
        <form action="searchResults.php" method="post">
            Search Term <input type="text" name="searchterm"><br />
            <input type="submit" value="Search">
        </form>
    </body>
</html>
PHP
PHP Code:
<?php
include 'library/config.php';
include 'library/opendb.php';

/*set varibles from form */
$searchterm = $_POST['searchterm'];
trim ($searchterm);
/*check if search term was entered*/
if (!$searchterm){
    echo 'Please enter a search term.';
}
/*add slashes to search term*/
if (!get_magic_quotes_gpc())
{
$searchterm = addslashes($searchterm);
}

/*query the database*/
$query = "SELECT * FROM `tblmembers` WHERE `FirstName` LIKE '%".$searchterm."%' AND `MemberApproved`='A'";
$result = mysql_query($query) or die('Error, query failed'.mysql_error());

/*number of rows found*/
$num_results = $result->num_rows;

echo '<p>Found: '.$num_results.'</p>';
/*loops through results*/
for ($i=0; $i <$num_results; $i++)
{
$num_found = $i + 1;
$row = $result->fetch_assoc();
echo "$num_found. ".($row['FirstName'])." <br />";
}

include 'library/closedb.php';
?>