jQuery Grid Plugin - jqGrid

I cant see the drop downlist on the grid actually i am seeing nothing at all i see an empty cell  instead of dropdownlist containing One,Two values

what am i doing wrong please help

Here is the Html

<

table id="testgrid" border="1">

</table>

<div id="Pagertest">

</div>

Here is my jqrid code:

var gridJson =

{

page: 1, total: 2, records: 10,

rows: [

            { Label:"Custom Field 1" },

            { Label:"Custom Field 2" } 

          ]

};

$(

"#testgrid").empty().jqGrid({

datatype:

'jsonstring', datastr: gridJson,

colNames: [

'Custom Field Name', 'myname'],

colModel: [          

{ name:'Label', index: 'Label', width: 500 },

{ name:'myname', edittype: 'select', editoptions: { value: { 1: 'One', 2: 'Two'}} },

],

pager: jQuery('#Pagertest'),

jsonReader:{ repeatitems:false },

height:"100%",

scrollOffset: 20,

rowNum: 10,

rowList: [10, 15, 20, 25],

beforeSelectRow:function (rowid, e)

{return false; }

});