datatable pagination work for first paginate only - php

Question

I am trying to paginate my data with data table plugin but its pagination works for the first time only. first, its loads showing data when I click on the second page it works but after that, it doesn't. it shows processing on the top of the table here is my code.
HTML
<table id="data_table" class="display" width="100%" cellspacing="0">
<thead>
<tr>
<th><input type="checkbox" id="selectAll"/></th>
<th>Plan Name</th>
<th>Description</th>
<th>Image</th>
<th>Quantity</th>
<th>Amount</th>
<th>Action</th>
</tr>
</thead>
<tbody></tbody>
</table>
JQUERY
$("#data_table").dataTable({
"bProcessing": true,
"bServerSide": true,
"bPaginate": true,
"sAjaxSource": "response.php",
});
PHP
if(isset($_GET['iDisplayStart']))
{
$start = $_GET['iDisplayStart'];
}
else
{
$start = 0;
}
if(isset($_GET['iDisplayLength']))
{
$limit = $_GET['iDisplayLength'];
}
else
{
$limit = 10;
}
$plan = new Plan();
$result = $plan->getPlanList($limit, $start);
$count= $plan->getCountPlanList();
$myarray['recordsTotal'] = $count[0]['count(*)'];
$myarray['recordsFiltered'] = $count[0]['count(*)'];
$myarray['draw'] = intval($start/$limit)+1;
$myarray['data'] ="";
foreach($result as $data)
{
$myarray['data'][] = array('<input type="checkbox" name="selectcheck[]" class="selectcheck" value="'.$data['id'].'">',$data['name'],$data['description'],$data['image'],$data['quantity'],$data['amount'],'Edit');
}
echo json_encode($myarray);
die;

Answer 1

problem solved. I use sEcho value for draw on server side
$myarray['draw'] = $_GET['sEcho'];