Inserting multiple rows into mysql with checkbox

below is my codes. I have two mysql database table, one is "member" and another one is "participants". I would like to display the data in table "member" to my local host page and I did it. However, I cannot insert multiple rows of "member" data by using checkbox to my database table "participants". I am stuck. Any help is much appreciated.

<?php
try{
$con = new PDO("mysql:host=localhost;dbname=kgruum member", "root", "");
$sql = $con->query("SELECT * FROM member");
echo"<table class='info' align='center' border='1'>";
echo"<tr><td width='10'></td>
<td width='10'><b>ID</b></td>
<td width='500'><b>Name</b></td>
<td width='50'><b>Handicap</b></td><tr>";

foreach($sql as $row) 
{
    $ID = $row["ID"];
    $Name = $row["Name"];
    $Handicap = $row["Handicap"];
echo"<tr>
<td><form method='POST' action='Add participant.php'><input type='checkbox' name='insert[]' value='$ID'></td>
<td>$ID</td>
<td>$Name</td>
<td>$Handicap</td><tr>";
}
echo"</table><div align='center'><input type='image' value='submit' src='add selected button.png' alt='submit Button' onmouseover='this.src='pink add selected button.png'' onmouseout='this.src='add selected button.png'' name='add_btn' id='add_btn'></div><br></form>";


if(isset($_POST['add_btn'])) {
if(!empty($_POST['insert'])) {
    foreach($_POST['insert'] as $check) {
    $st=$con->prepare("INSERT INTO participants(ID,Name,Handicap) VALUES('$ID','$Name','$Handicap')");
    $insert->bindParam('ID',$ID);
    $insert->bindParam('Name',$Name);
    $insert->bindParam('Handicap',$Handicap);
    $st->execute();
    }echo "<script type='text/javascript'>
    alert('Successful Insert ! ');
    window.location.href = 'Add participant.php';
    </script>";
}else{
echo "<script type='text/javascript'>alert('You didn't choose which user you want to insert ! ')</script>";
}
}
}catch(PDOException $e)
{
echo "error".$e->getMessage();
}
?>