jQuery Grid Plugin - jqGrid

Hi there.

I'm currently building a website for a colleague and have resorted to using JQGRID to allow database editing from a manager's page. The problem I'm encountering is when I go to save a new row (using inline code), I get an error "e.p.savedRow[0] is undefined" (as seen in Firebug).

I do not encounter this error when editing an existing record, or deleting a record, only when I'm adding a new record. This has me stumped as I'm not sure where I have gone wrong. The code is shown below:

<div style='overflow: auto;'>
                <table id='list3'></table>
                <div id='pager3'></div>
        </div>


        <script>

                jQuery('#list3').jqGrid({
                        url:'/accent/index.php?id=39',
                        datatype: 'json',
                        colNames:['ID','Brand', 'Item Code', 'S. Desc','L. Desc','Range',
                                'Colour/Finish','Category','Fitment','No of Bulbs','Type of Lamp','Light Socket','Max W',
                                'Max LE Lamp','IP','Width','Length','Height','Min Drop','Max Drop',
                                'Projection','Weight','Shade Code','RRP','Price','Clearance','Featured'
                                ],
                        colModel:[
                                {name:'id',index:'id', width:40,align:'center',editable:true},
                                {name:'brand',index:'brand', width:70,align:'center',editable:true},
                                {name:'itemCode',index:'itemCode', width:75,align:'center',editable:true},
                                {name:'shortDesc',index:'shortDesc', width:100,editable:true},
                                {name:'longDesc',index:'longDesc', width:200,editable:true},
                                {name:'range',index:'range', width:100,align:'center',editable:true},
                                {name:'colourFinish1',index:'colourFinish1',width:100,align:'center',editable:true},
                                {name:'groupOfLights',index:'groupOfLights',width:100,align:'center',editable:true},
                                {name:'typeOfFitting',index:'typeOfFitting',width:100,align:'center',editable:true},
                                {name:'noOfLamp1',index:'noOfLamp1',width:80,align:'center',editable:true},
                                {name:'typeOfLamp1',index:'typeOfLamp1',width:80,align:'center',editable:true},
                                {name:'lightSocketLamp1',index:'lightSocketLamp1',width:50,align:'center',editable:true},
                                {name:'maxWattageLamp1',index:'maxWattagelamp1',width:50,align:'center',editable:true},
                                {name:'maxLowEnergyLamp',index:'maxLowEnergyLamp',width:50,align:'center',editable:true},
                                {name:'ipRating',index:'ipRating',width:50,align:'center',editable:true},
                                {name:'width',index:'width',width:50,align:'right',editable:true},
                                {name:'length',index:'length',width:50,align:'right',editable:true},
                                {name:'height',index:'height',width:50,align:'right',editable:true},
                                {name:'minimumDrop',index:'minimumDrop',width:60,align:'right',editable:true},
                                {name:'maximumDrop',index:'maximumDrop',width:60,align:'right',editable:true},
                                {name:'projection',index:'projection',width:100,align:'right',editable:true},
                                {name:'weight',index:'weight',width:50,align:'right',editable:true},
                                {name:'shadeCode1',index:'shadeCode1',width:50,align:'right',editable:true},
                                {name:'rrp',index:'rrp',width:50,align:'right',editable:true},
                                {name:'price',index:'price',width:50,align:'right',editable:true},
                                {name:'clearance',index:'clearance',width:50,align:'center',editable:true},
                                {name:'featured',index:'featured',width:50,align:'center',editable:true}
                        ],
                        rowNum:25,
                        rowList:[25,50,100],
                        pager: '#pager3',
                        sortname: 'id',
                        viewrecords: true,
                        sortorder: 'desc',
                        caption:'Edit Products',
                        height: '500px',
                        editurl:'/accent/core/components/productsdatabase/editJSON.php?&u=admin
                });

                jQuery('#list3').jqGrid('navGrid','#pager3',{edit:false,add:false,del:true});
                jQuery('#list3').jqGrid('inlineNav','#pager3',{edit:true,add:true,del:false});
        </script>