Problema com paginacao site

tenho o seguinte codigo assim, fica dando erre erro

Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in C:\wamp\www\tt\admin\admin-inbox\completos.php on line 96

<?php include_once("sistema/restrito_admin.php");?>
<?php include_once("sistema/validar_user.php");?>
<?php include_once("header.php");?>
<div id="local">
 <div class="caminho">Onde Estou: Guia Mart » Painel de Controle » Admin Inbox</div><!--caminho-->
 <div class="welcome">Olá <?php echo $clienteNome;?>| Hoje <?php echo date('d/m/Y H:i').'h';?> | <a href="deslogar.php">Deslogar</a></div><!--welcome-->
</div><!--local-->

<div id="content">

<?php include_once("menu.php");?>

 <div id="content_conteudo">

<?php include_once("sistema/carregando.php");?>

<form name="s_emailAdmin" action="painel.php?exe=admin-inbox/search" enctype="multipart/form-data" method="post">
 <label>
 <input type="text" name="s" size="50" />
 <input type="submit" name="executar" id="executar" value="Pesquisar pelo nome" />

 </label>
</form>

 <div class="inbox">

<table width="100%" border="0" cellspacing="2" cellpadding="0">
 <tr style="background:#666; color:#FFF; font:12px Arial, Helvetica, sans-serif; font-weight:bold;">
 <td align="center">DATA:</td>
 <td align="center">NOME:</td>
 <td align="center">EMAIL:</td>
 <td align="center">EXECUTAR:</td>
 </tr>
<?php
$emailStatus = 'completo';

$pag = "$_GET[pag]";
if($pag >= '1'){
$pag = $pag;

}else{

$pag = '1';
}

$maximo = '3'; //RESULTADOS POR PÁGINA

$inicio = ($pag * $maximo) - $maximo;

$sql_inboxAdmin = 'SELECT * FROM up_mailadmin WHERE emailStatus = :emailStatus ORDER BY emailData ASC LIMIT '.$inicio.','.$maximo;

try{

$query_inboxAdmin = $conecta->prepare($sql_inboxAdmin);
$query_inboxAdmin->bindValue(':emailStatus',$emailStatus,PDO::PARAM_STR);
$query_inboxAdmin->execute();

$resultado_inboxAdmin = $query_inboxAdmin->fetchAll(PDO::FETCH_ASSOC);

}catch(PDOexception $error_inboxAdmin){

 echo 'Erro ao selecionar pendentes';
}

foreach($resultado_inboxAdmin as $res_inboxAdmin){
	$emailId = $res_inboxAdmin['emailId'];
	$emailNome = $res_inboxAdmin['emailNome'];
	$emailEmail = $res_inboxAdmin['emailEmail'];
	$emailMensagem = $res_inboxAdmin['emailMensagem'];
	$emailData = $res_inboxAdmin['emailData'];
	$emailStatus = $res_inboxAdmin['emailStatus'];
	$emailResposta = $res_inboxAdmin['emailResposta'];
	$emailTxt = $res_inboxAdmin['emailTxt'];
	$i++;
	if($i % 2 == 0){
 $cor = 'style="background:#E6FFF2"';
	}else{
 $cor = 'style="background:#f4f4f4;"';
	}

?>

 <tr <?php echo $cor;?>>
 <td align="center"><?php echo date('d/m/Y H:i',strtotime($emailData));?>h</td>
 <td align="center"><?php echo $emailNome;?></td>
 <td align="center"><?php echo $emailEmail;?></td>
 <td align="center"><a href="painel.php?exe=admin-inbox/ver&emailId=<?php echo $emailId;?>">Visualizar</a></td>
 </tr>

<?php
}
?>

</table>

<?php
include"../Connections/painel_config.php";

//USE A MESMA SQL QUE QUE USOU PARA RECUPERAR OS RESULTADOS
//SE TIVER A PROPRIEDADE WHERE USE A MESMA TAMBÉM

$sql_res = mysql_query("SELECT * FROM up_mailadmin WHERE emailStatus = 'completo' ORDER BY emailData ASC");
$total = mysql_num_rows($sql_res);

$paginas = ceil($total/$maximo);

$links = '1'; //QUANTIDADE DE LINKS NO PAGINATOR

echo "<a href=\"painel.php?exe=admin-inbox/completos&pag=1\">Primeira Página</a>   ";

for ($i = $pag-$links; $i <= $pag-1; $i++){
if ($i <= 0){

}else{

echo"<a href=\"painel.php?exe=admin-inbox/completos&pag=$i\">$i</a>   ";
}
}echo "$pag    ";

for($i = $pag +1; $i <= $pag+$links; $i++){
if($i > $paginas){

}else{

echo "<a href=\"painel.php?exe=admin-inbox/completos&pag=$i\">$i</a>   ";
}
}
echo "<a href=\"painel.php?exe=admin-inbox/completos&pag=$paginas\">Última página</a>   ";
?>

 </div><!--inbox-->

 </div><!--conteudo-->

</div><!--contet-->

<?php include_once("footer.php");?>