I am trying to pass an xml string into the datasource argument and I keep getting an invalid data message when I load the page. Any help would be appreciated. 
  
  <head> 
   <title>FusionCharts XT - Column 2D Chart - Data from a database</title>
 <link  rel="stylesheet" type="text/css" href="css/style.css" />
 
<!--  Include the `fusioncharts.js` file. This file is needed to render the chart. Ensure that the path to this JS file is correct. Otherwise, it may lead to JavaScript errors. -->
 
      <script src="fusioncharts/fusioncharts.js"></script>
   </head>
 
 
<?php
 
include("fusioncharts/fusioncharts.php");
 
$servername = "localhost";
$username = "*****";
$password = "****";
$dbname = "***";
 
// Create connection
$dbhandle = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($dbhandle->connect_error) {
    die("Connection failed: " . $dbhandle->connect_error);
} 
 
 
 $dbhandle = new mysqli($servername, $username, $password, $dbname);
 
 // Render an error message, to avoid abrupt failure, if the database connection parameters are incorrect
 if ($dbhandle->connect_error) {
  exit("There was an error with your connection: ".$dbhandle->connect_error);
 }
 
  // Form the SQL query that returns the top 10 most populous countries
  $strQuery = "SELECT * FROM scores";
  
  //$retval = mysql_query( $sql, $conn );
 
  // Execute the query, or else return the error message.
  $result = $dbhandle->query($strQuery) or exit("Error code ({$dbhandle->errno}): {$dbhandle->error}");
 
//while($row = mysql_fetch_assoc($result)) {
     // echo "Category :{$row['category']}  <br> ".
     //    "score : {$row['score']} <br> ".
     //    "--------------------------------<br>";
 //  }
 
$strXML ="'<chart><categories>";
 
 
  // If the query returns a valid response, prepare the XML string
 if ($result) {
    // The `$arrData` array holds the chart attributes and data
    
    
//$arrData["data"] = array();
 
// Push the data into the array
         while($row = mysqli_fetch_array($result)) {
         
         $strQuery2 = "select * from desirescores where ID =" . $row['ID'];
         //echo $strQuery2;
           $result2 = mysqli_query($dbhandle, $strQuery2) or die(mysqli_error()); 
       $ors2 = mysqli_fetch_array($result2); 
          //Generate <set label='..' value='..'/>
          
          //free the resultset
 
            $strXML .= "<category label='" . $ors2['category'] . "' />";
                    mysqli_free_result($result2);     
         }
         
         
        }
 
$strXML .= "</categories><dataset seriesName='Athlete Scores'>";
$strXML .="<set value='35' /><set value='48' /><set value='31' /><set value='40' /><set value='36' /><set value='36' /><set value='36' /><set value='36' /></dataset></chart>'";
 
echo $strXML;
 
$radarChart = new FusionCharts("radar", "myFirstChart" , 600, 300, "chart-1", "XML", $strXML);
 
$radarChart->render();
 
 $dbhandle->close();
 
 
?>
 
   <div id="chart-1"><!-- Fusion Charts will render here--></div>