title: dgrid ondemand grid not filling with memory store
body: <p>I'm trying to fill my dgrid onDemand Grid with a memory store, but the grid wont populate with the data.  I'm making an xhr.get call and I've verified the data is being returned.  This is what I have:</p>
  
  <pre><code> ......     
   var grid;
  
   function TicketUnMarkedSet(GridData) {//this function is called back after xhr.get and the parameter GridData is populated
            var gridStore = new Memory({ data: GridData });//this store seems to be ok
            grid = new OnDemandGrid({
                showHeader: true,
                store:gridStore
            }, "gridDiv");
            grid.startup(); 
            grid.refresh();
        }
  
  &lt;div style="position: absolute; left: 0px; bottom: 0px; z-index: 999;"&gt;
            &lt;div id="tpStationData" data-dojo-type="dijit/TitlePane" data-dojo-props="title:'Open Tickets', closable:false,  open:false"&gt;
                &lt;div id="gridTabDiv" data-dojo-type="dijit/layout/ContentPane" style="width: 100%;
                    height: 100%; overflow: auto;" title="Data"&gt;
                    &lt;div id="gridDiv"&gt;
                    &lt;/div&gt;
                &lt;/div&gt;
            &lt;/div&gt;
        &lt;/div&gt;
  </code></pre>
  
  <p>Any idea why this grid would be empty?  Thanks</p>