Filtrar tabela com CheckBox

Olá pessoal... estou tentando criar uma tabela com filtros e estou utilizando o seguinte sistema que está quase lá

http://jsfiddle.net/abhiklpm/ZEDR9/5/

Quando eu seleciono Shipping  e 2GB  era pra me retornar apenas a linha 3, assim:

Memory3     Shipping     2GB     1333MHz

Mas ta retornando todos os "Shipping "

Memory1     Shipping     1GB     1333MHz

Memory3     Shipping     2GB     1333MHz

Memory5     Shipping     4GB     1333MHz

segue o codigo, agradeço quem puder ajudar

<input class="prod_status " rel="status" type="checkbox" value="Discontinued">Discontinued
<br/>
<input class="prod_status" rel="status" type="checkbox" value="Shipping">Shipping
<br/>
<input class="prod_capacity" rel="capacity" type="checkbox" value="1GB">1GB
<br/>
<input class="prod_capacity" rel="capacity" type="checkbox" value="2GB">2GB
<br/>
<input class="prod_capacity" rel="capacity" type="checkbox" value="4GB">4GB
<br/>
<input class="prod_speed" rel="speed" type="checkbox" value="1000MHz">1000MHz
<br/>
<input class="prod_speed" rel="speed" type="checkbox" value="1333MHz">1333MHz
<br/>

<br />
<br />
<table class="someclass" border="0" cellpadding="0" cellspacing="0" summary="bla">
 <caption>bla bla</caption>
 <thead>
 <tr id="ProductID" class="first">
 <th>Product Number</th>
 <th>Status</th>
 <th>Capacity</th>
 <th>Speed</th>
 </tr>
 </thead>
 <tbody>
 <tr id="Memory1" class="part_detail">
 <td class="name">Memory1</td>
 <td class="status" rel="Shipping">Shipping</td>
 <td class="capacity" rel="1GB">1GB</td>
 <td class="speed" rel="1333MHz">1333MHz</td>
 </tr>
 <tr id="Memory2" class="part_detail">
 <td class="name">Memory2</td>
 <td class="status" rel="Discontinued">Discontinued</td>
 <td class="capacity" rel="Shipping">2GB</td>
 <td class="speed" rel="1000MHz">1000MHz</td>
 </tr>
 <tr id="Memory3" class="part_detail">
 <td class="name">Memory3</td>
 <td class="status" rel="Shipping">Shipping</td>
 <td class="capacity" rel="2GB">2GB</td>
 <td class="speed" rel="1333MHz">1333MHz</td>
 </tr>
 <tr id="Memory4" class="part_detail">
 <td class="name">Memory4</td>
 <td class="status" rel="Discontinued">Discontinued</td>
 <td class="capacity" rel="4GB">4GB</td>
 <td class="speed" rel="1000MHz">1000MHz</td>
 </tr>
 <tr id="Memory5" class="part_detail">
 <td class="name">Memory5</td>
 <td class="status" rel="Shipping">Shipping</td>
 <td class="capacity" rel="4GB">4GB</td>
 <td class="speed" rel="1333MHz">1333MHz</td>
 </tr>
 </tbody>

 $("input:checkbox").click(function () {
 var showAll = true;
 $('tr').not(':first').hide();
 $('input[type=checkbox]').each(function () {
 if ($(this)[0].checked) {
 showAll = false;
 var status = $(this).attr('rel');
 var value = $(this).val();
 $('td.' + status + '[rel="' + value + '"]').parent('tr').show();
 }
 });
 if(showAll){
 $('tr').show();
 }
});