Need ideas

Hi,
I'm a using DataTables to show the results of a query with some filters. I'm using Zend Framework with Zend Form to obtain data for making the Postgresql query.

DataTables: 1.8.2
Jquery: v1.7.1
Jquery ui: 1.8.12

As some queries overloads php memory (almost 100.000 rows), i decided to use the ajax request to only ask for certain pages of each request.

The point is:
I checked for the json response and it's always well formed, and json lint says it's valid, but it is not shown in the dataTable, for example a query asking for rows with date=2013/01/15 which has exactly 16 rows.

But if I make a query asking for the same date and type='extra' which returns exactly the same 16 rows, and the json returned is exactly the same, it is drawn, shown or whatever you want to call it.

I debugged the queries to db, the code and every param from the server (it is an internal aplication so it can't be shown directly), and tried almost every option. And I don't know what to do to make it go well.

Here some parts of the code:
Parameters passed to the jQuery

list($module, $controller, $action) = explode("/", getenv('REQUEST_URI')); /*Agafem el nom del controller, action, module i primer parametre*/
$rest = explode("$module/$controller/$action/", getenv('REQUEST_URI'));
if(($action == 'search' || $action == 'ajax') && $comprovacio['ajax_pagination']){
			$sUrl = $module."/".$controller."/"."ajax".$rest[1];
			$aParams = array("bJQueryUI" =>true,
					"bPaginate" => true,
					"bInfo" => true,
					"bAutoWidth" => false,
					"bFilter" => false,
					"bSort" => false,
					"bServerSide" => true,
					"bDestroy" => true,
					"sServerMethod" => "POST",
					"sPaginationType"=> "full_numbers",
					"sAjaxSource"=> $sUrl
			);
		}

Using a simple transformation in the jQuery, of course.

And the formation of the response.

$response = array(
				"iTotalRecords" => $iEntitySet,
				"iTotalDisplayRecords" => $iEntitySet,
				"sEcho" => intval($sEcho),
				"aaData" =>  $data/*Aixo es el que mostra la taula*/
		);
$this -> _helper -> json($response);

And the json gotten from the server with it (passed through json lint to make it readeble):

{
    "iTotalRecords": 888,
    "iTotalDisplayRecords": 888,
    "sEcho": 1,
    "aaData": [
        [
            "<a  title=\"Editar\"  href=\"registre/registreentrada/edit/id/11536/hash/n_xR35_d7XH66agrGBSxgHvUovK7JbNzcvO8rjEllu0=\"   ><img src=\"../../common/public/imgs/edit.png\"></a>",
            "2012/0755",
            "<a class=\"fwLink\" target=\"new\" href=\"common/file/download/name/E2012-0755.pdf/hash/1v7i4z_J0zu4qcWrjdX8rp77wdJVAkxlTRi3s5425gU=\"fwtitle=\"E2012-0755.pdf\"><img align=\"center\" src=\"../../common/public/imgs/ico-pdf.png\"></a>",
            "2012-11-16",
            "2012-11-16",
            "Convenis Empresa (pràctiques)",
            "Manel Hernández Montuenga, Socio Sagardoy",
            "Javier Junceda Moreno, Degà FCJP",
            "Conv. prac. FCJP y SAGARDOY ABOGADOS, S.L.",
            "campus Barcelona"
        ],
        [
            "<a  title=\"Editar\"  href=\"registre/registreentrada/edit/id/11525/hash/011d1CJKca7QIvixsVcK4_vi4tkXcU60qHCek8Z1ns0=\"   ><img src=\"../../common/public/imgs/edit.png\"></a>",
            "2012/0744",
            "<a class=\"fwLink\" target=\"new\" href=\"common/file/download/name/E2012-0744.pdf/hash/F_l6OdYZaZ6GkrrsSgePfD_h56mGPhN5vn2uCAt0MXM=\"fwtitle=\"E2012-0744.pdf\"><img align=\"center\" src=\"../../common/public/imgs/ico-pdf.png\"></a>",
            "2012-11-14",
            "2012-11-14",
            "Convenis Empresa (pràctiques)",
            "Núria Mompel i Tusell, Abogada",
            "Francisco Javier Junceda Moreno",
            "Conv. prac. FCJP i NÚRIA MOMPEL I TUSELL",
            "campus Barcelona"
        ],
        [
            "<a  title=\"Editar\"  href=\"registre/registreentrada/edit/id/11526/hash/bqX52wu9oefpx9DYu96KLEkHFBorHON2uGAHnVa2Tz8=\"   ><img src=\"../../common/public/imgs/edit.png\"></a>",
            "2012/0745",
            "<a class=\"fwLink\" target=\"new\" href=\"common/file/download/name/E2012-0745.pdf/hash/Qs_4XFq1wmp9398ynjpr4E14uBLLI1IODdb1OKgDlpc=\"fwtitle=\"E2012-0745.pdf\"><img align=\"center\" src=\"../../common/public/imgs/ico-pdf.png\"></a>",
            "2012-11-14",
            "2012-11-14",
            "Convenis Empresa (pràctiques)",
            "Marti Gisbert Marti, Gerent",
            "Francisco Javier Junceda Moreno",
            "Conv. prac. FMCS i Centre de Fisioteràpia Marti Gisbert i Marti",
            "campus Barcelona"
        ],
        [
            "<a  title=\"Editar\"  href=\"registre/registreentrada/edit/id/11509/hash/_esKWtNvAoN8Kf4h1lh3Jl0SPe_3X6lIULXxCODkCSU=\"   ><img src=\"../../common/public/imgs/edit.png\"></a>",
            "2012/0728",
            "<a class=\"fwLink\" target=\"new\" href=\"common/file/download/name/E2012-0728.pdf/hash/FJBJwSs7K4V2_x1aRy9ycwYUplGtFjTRjYOSjDfRSUc=\"fwtitle=\"E2012-0728.pdf\"><img align=\"center\" src=\"../../common/public/imgs/ico-pdf.png\"></a>",
            "2012-11-08",
            "2012-11-08",
            "Convenis Empresa (pràctiques)",
            "Victor Latorre Val, Administrador",
            "Vicenç Sarrablo, Director ESARQ",
            "Conv. prac. ESARQ i Canales del Fluviá Náutic, S.L.",
            "campus Barcelona"
        ],
        [...],//filled as the ones before, to save some space here
        [...],
        [...], 
        [...],
        [...],
        [...]
    ]
}

Any ideas that can make it go well would be welcomed. I've been working on this for more than a week and I'm a bit frustrated that sometimes it works and sometimes not.

Thanks in advance.