jQuery Grid Plugin - jqGrid

Hello all,

I've configured a subgrid like below and when I try to expand the rows it just spins on "Loading" forever.  Using the network browser tools it looks like there's never actually a request made to the server. 

Can anyone advise on how to troubleshoot?

Thanks.

-Joe

var listDataURL = '/cms/getDashboardCampaignData.do';
	var initialPageSize = 20;
	var maxRecords = 10000;
	var pageSizes = [initialPageSize, 40, 80,  maxRecords];
	
	// jqGrid Configurations
	jq(function() {
		jQuery("#campaignPerformanceGrid").jqGrid({
		   	url:listDataURL,
			datatype: 'json',
			mtype: 'POST',
		   	colNames:['campaignID', '% Complete', 'CampaignName', 'Priority', 'CTR','Pricing Model','Start', 'More Info'],
		   	colModel:[
		   		{name:'campaignId',index:'campaignId',sorttype:"int", hidden:true},
		   		{name:'completionPercentage',index:'completionPercentage',sorttype:"float"},
		   		{name:'name',index:'name',sorttype:"text"},
		   		{name:'priority',index:'priority',sorttype:"int"},
    		    {name:'ctr',index:'ctr',sorttype:"float"},
    		    {name:'pricingModel',index:'pricingModel',sorttype:"text"},
    		    {name:'startDate',index:'startDate',sorttype:"date"},													
		   		{name:'campaignId', index:'campaignId', formatter:moreInfoFormatter, sortable:false}
		   	],
		   	postData: { },
			rowNum:initialPageSize,
		   	rowList:pageSizes,
        	height: "auto",
        	width: 800,
		   	//autowidth: true,
			altRows     : true,
			ignoreCase: true, //Filter and Sort is case-insensitive
		   	pager: '#pager',
		    viewrecords: true,
		   	sortname: 'name',
		    sortorder: "asc",
		    caption:"",
		    emptyrecords: "No data found",
		    loadonce: true,
		    loadComplete: function() { },
		    jsonReader : {
		        root: "rows",
		        page: "page",
		        total: "total",
		        records: "records",
		        repeatitems: false,
		        cell: "cell",
		        id: "id"
		    },
		    subGrid: true,
		    subGridUrl: '/cms/getDashboardCampaignSubGridData.do',
		    subGridModel : [ 
		      {
		      name  : ['flightId'],
		      width : [55],
		      align : ['left']
		      }
		    ]
		});
		
		// Set Label for rowList
		jQuery("#pager option[value=" + maxRecords + "]").text('All');
		
		
		// Navigation Toobar
		jQuery("#grid").jqGrid('navGrid','#pager',
			{add:false, del:false, edit:false, search:false, refresh:true, 
				beforeRefresh:function() {jq("#grid").jqGrid('setGridParam', {url:listDataURL, datatype:"json"}); }
			},
			{ }, //settings for edit
		    { }, // settings for add
		    { }, // settings for delete
			{}   // enable the advanced searching
		);
		/*
		jq("#grid").navButtonAdd('#pager',
				{ 	caption:"", 
					buttonicon:"ui-icon-plus", 
					onClickButton: showCreateAdvertiserPage,
					position: "last", 
					title:"Create New Advertiser", 
					cursor: "pointer"
				}
		);*/ 
		
		jQuery("#grid").jqGrid('filterToolbar',{stringResult: true,searchOnEnter : false});
		
	});