jQuery Grid Plugin - jqGrid

This was my second attempt (using custom XML). The grid is:

$(document).ready(function() {
            $("#list").jqGrid({
                url: '../Order.mvc/Xml',
                mType: 'GET',
                colNames: ['Num', 'First Name', 'Surname'],
                colModel: [
                { name: 'num,', index: 'num', width: 55, resizable: true, xmlmap: "contactId" },
                { name: 'name', index: 'name', width: 90, resizable: true, xmlmap: "firstName" },
                { name: 'surname', index: 'surname', width: 120, resizable: true, xmlmap: "lastName" }
                ],
                datatype: 'xml',
                viewrecords: true,
                pager: $('#pager'),
                rowNum: 10,
                rowList: [5, 10, 15],
                sortname: 'num',
                sortorder: 'desc',
                multiselect: true,
                multikey: "ctrlKey",
                caption: 'My first grid',
                imgpath: "/themes",
                xmlreader: {
                    root: "contacts",
                    row: "contact",
                    page: "contacts>page",
                    total: "contacts>total",
                    records: "contacts>records",
                    repeatitems: false
                }
        });
    });

and the XMl returned from the server is:

<?xml version="1.0" encoding="utf-8"?>
<contacts>
  <page>1</page>
  <total>1</total>
  <records>2</records>
  <contact>
    <contactId>2</contactId>
    <firstName>Barry</firstName>
    <lastName>Gottshall</lastName>
  </contact>
  <contact>
    <contactId>3</contactId>
    <firstName>Armando</firstName>
    <lastName>Valdes</lastName>
  </contact>
</contacts>

Thanks.

Thanks you both for your help and apologies for the very slow reply but I've been off work for nearly a week.

I have added an id field to the xmlReader so that it now looks like this:

xmlReader: {
  root: "contacts",
  row: "contact",
  page: "contacts>page",
  total: "contacts>total",
  records: "contacts>records",
  repeatitems: false,
  id: "contactId"
}

I have changed the casing on mtype and xmlReader to be correct and I have checked the casing of all other attributes. Unfortunately the grid is still not loading any data.

Can you give me any hints as to where to look or how to go about debugging this issue?

Many thanks,

Phil

Thanks, but the colModel already specifies this - unfortunately there is a problem with word wrap so this part has gone off the edge of the post although you can see it via 'View Source'!