jQuery Grid Plugin - jqGrid

I want to delete a row in the grid, but the grid always post's only the id and oper, I also want to post additional data like rowID. The funny thing is that for editing a row the POST variables like rowID, idAsigurator,persoana, cilindree are present. For deleting a row only the id and oper variables are present.

My jqgrid is something like :

jQuery("#editgrid").jqGrid({

 url:'autoXML.php',datatype: "xml",

colNames:['RowID','Asigurator','Cilindree','Persoana', 'Perioada', 'Pret'],

 colModel:[  {name:'rowID',index:'rowID', width:60, editable:true},

 {name:'idAsigurator',index:'idAsigurator', width:100, editable:true,editoptions:{size:20}},

 {name:'cilindree',index:'cilindree', width:90, editable:true,editoptions:{size:20}},

 {name:'persoana',index:'persoana', width:300,editable:true,edittype:"select"},

 {name:'perioada',index:'perioada', width:120, align:"right",edittype:"select",editable:true},

 {name:'pret',index:'pret', width:80, align:"right",editable:true,editoptions:{size:20}} 

    ],

 width:900, height:600, pager: '#pagered', sortname: 'rowID', viewrecords: true, 

sortorder: "desc", caption:"Autoturisme",  editurl:"autoPOST.php"

 });

jQuery("#editgrid").jqGrid('navGrid',"#pagered",{edit:true,add:true,del:true});


The xml file looks like this : 

<rows>
<page>1</page>
<total>1</total>
<records>5</records>


<row>
<cell>1</cell>
<cell>1</cell>
<cell>1401-1600 cmc</cell>
<cell>Pensionar</cell>
<cell>12 luni</cell>
<cell>155</cell>
</row>


<row>
<cell>2</cell>
<cell>1</cell>
<cell>1401-1600 cmc</cell>
<cell>Pensionar</cell>
<cell>12 luni</cell>
<cell>200</cell>
</row>


<row>
<cell>3</cell>
<cell>1</cell>
<cell>1401-1600 cmc</cell>
<cell>Pensionar</cell>
<cell>12 luni</cell>
<cell>300</cell>
</row>


<row>
<cell>4</cell>
<cell>1</cell>
<cell>1401-1600 cmc</cell>
<cell>Pensionar</cell>
<cell>12 luni</cell>
<cell>400</cell>
</row>


<row>
<cell>11</cell>
<cell>1</cell>
<cell>1401-1600 cmc</cell>
<cell>Pensionar</cell>
<cell>12 luni</cell>
<cell>500</cell>
</row>
</rows>

Can someone please help me on this problem ...

Thanks