jQuery Grid Plugin - jqGrid

I have been trying to get jqgrid to work with an xml data set now for several hours and it just won't work. The grid shows up with the correct headers, but the data is not loaded.

I have stripped down the xml that is returned to be more simple, figuring something would make it work, but nothing has worked. Here is the code I am trying now:

var mystr = "<?xml version='1.0' encoding='utf-8'?><top><rowset><row id='1'><LOG_ID>69</LOG_ID><EVENT_ID>0</EVENT_ID><SUMMARY>Test 8</SUMMARY><LOCATION>here</LOCATION><DTSTART>dtstart</DTSTART><TRANSACTION_DATE>Transdate</TRANSACTION_DATE><MESSAGE>message</MESSAGE><SUCCESS>N</SUCCESS></row><row id='2'><LOG_ID>68</LOG_ID><EVENT_ID>0</EVENT_ID><SUMMARY>Test 7</SUMMARY><LOCATION>here</LOCATION><DTSTART>Startdate</DTSTART><TRANSACTION_DATE>Transdate</TRANSACTION_DATE><MESSAGE>Message</MESSAGE><SUCCESS>N</SUCCESS></row></rowset></top>";
            $("#logViewer").jqGrid({
                //url:'cronservlet/log',
                //datatype: 'xml',
                datatype: 'xmlstring',
                datastr : mystr,
                xmlReader: {
                  root:'rowset',
                  row:'row'
                },
                colNames:[
                    'Log ID',
                    'Event ID',
                    'Summary',
                    'Location',
                    'Start Date',
                    'Transaction Date',
                    'Message',
                    'Success'],
                colModel:[
                  {name:"logid", index:'logid', xmlmap:"LOG_ID"},
                  {name:"eventid", index:'eventid', xmlmap:"EVENT_ID"},
                  {name:"summary", index:'summary', xmlmap:"SUMMARY"},
                  {name:"location", index:'location', xmlmap:"LOCATION"},
                  {name:"dtstart", index:'dtstart', xmlmap:"DTSTART"},
                  {name:"transdate", index:'transdate', xmlmap:"TRANSACTION_DATE"},
                  {name:"message", index:'message', xmlmap:"MESSAGE"},
                  {name:"success", index:'success', xmlmap:"SUCCESS"}
                ],
                sortname: 'logid',
                sortorder: 'desc',
                rowNum: 10,
                pager: jQuery('#pager'),
                viewrecords: true,
                imgpath: 'js/jqgrid/themes/basic/images',
                caption: 'Exchange Cron Log'
            });