require_once("lib/soap/nusoap.php");
    $wsdlURL = "http://www.runsaturday.com/runsaturday/GPXSync.asmx";
    $soap = new nusoap_client($wsdlURL);
    // $soap->setDebugLevel(9);
    
    $username="yourusername";
    $pass="yourpass";

$header="<UploadTrackCredentials xmlns=\"http://www.runsaturday.com\">
      <UserName>$username</UserName>
      <SecretKey>$pass</SecretKey>
    </UploadTrackCredentials>";
 
    
    $parameters['sportType'] ="Run";
    $parameters['sportSubType'] ="Trail Running";
        
    // now get the gpx file
    $data=file_get_contents("1.gpx");
    echo "original file length: ".strlen($data)."<br>";
    $data=gzencode($data);
    echo "gzipped file length: ".strlen($data)."<br>";
    $data=base64_encode($data);
    echo "base64 file length: ".strlen($data)."<br>";
    
    $parameters['compressedData'] =$data;
    $parameters['collectedFrom'] ="LiveTrack24";
    
    $result = $soap->call('UploadUsingPasswordFrom', $parameters, "http://www.runsaturday.com","http://www.runsaturday.com/UploadUsingPasswordFrom", $header,    null,"rpc","literal" );
    
    if ($debug) {    
        print_r($result);        
        // Display the request and response
        echo '<h2>Request</h2>';
        echo '<pre>' . $soap->request. '</pre>';
        echo '<h2>Response</h2>';
        echo '<pre>' .$soap->response . '</pre>';
    }

original file length: 140392<br>gzipped file length: 23481<br>base64 file length: 31308<br>

Array
(
    [faultcode] => soap:Server
    [faultstring] => System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.ArgumentNullException: Value cannot be null.
Parameter name: InString
   at System.Convert.FromBase64String(String s)
   at SlodgeRoutesTools.Utils.Compression.Decompress(String compressedText, Boolean hasHeader) in C:\Users\Stuart\Documents\Visual Studio 2010\Projects\DNN\SlodgeRoutesTools\Utils\Compression.cs:line 68
   at SlodgeRoutesTools.Utils.Compression.DecompressNoHeader(String compressedText) in C:\Users\Stuart\Documents\Visual Studio 2010\Projects\DNN\SlodgeRoutesTools\Utils\Compression.cs:line 96
   at SlodgeRoutesTools.GPXTrackUpload.DoUpload(UploadTrackCredentials credentials, String sportTypeAsString, String sportSubType, String compressedData, Boolean skipDuplicates, Boolean useSecretKeyNotPassword, String collectedFrom) in C:\Users\Stuart\Documents\Visual Studio 2010\Projects\DNN\SlodgeRoutesTools\GPXTrackUpload.cs:line 130
   at GPXSync.UploadUsingPasswordFrom(String sportType, String sportSubType, String compressedData, String collectedFrom)
   --- End of inner exception stack trace ---
    [detail] =>
)
<h2>Request</h2><pre>POST /runsaturday/GPXSync.asmx HTTP/1.0
Host: www.runsaturday.com
User-Agent: NuSOAP/0.9.5 (1.123)
Content-Type: text/xml; charset=ISO-8859-1
SOAPAction: "http://www.runsaturday.com/UploadUsingPasswordFrom"
Content-Length: 32094

<?xml version="1.0" encoding="ISO-8859-1"?><SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"><SOAP-ENV:Header><UploadTrackCredentials xmlns="http://www.runsaturday.com">
      <UserName>BarryCornelius</UserName>
      <SecretKey>somepasswordwhichI'veremoved</SecretKey>
    </UploadTrackCredentials></SOAP-ENV:Header><SOAP-ENV:Body><ns1912:UploadUsingPasswordFrom xmlns:ns1912="http://www.runsaturday.com"><sportType>Run</sportType><sportSubType>Trail Running</sportSubType><compressedData>H4sIAAAAAAAAA629y7Jlx5UkNq+vgGHO...</compressedData><collectedFrom>MyGarmin305</collectedFrom></ns1912:UploadUsingPasswordFrom></SOAP-ENV:Body></SOAP-ENV:Envelope></pre><h2>Response</h2><pre>HTTP/1.1 500 Internal Server Error
Cache-Control: private
Content-Type: text/xml; charset=utf-8
Server: Microsoft-IIS/7.0
X-AspNet-Version: 2.0.50727
X-Powered-By: ASP.NET
Date: Sun, 01 Aug 2010 09:59:57 GMT
Connection: close
Content-Length: 1466

<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><soap:Body><soap:Fault><faultcode>soap:Server</faultcode><faultstring>System.Web.Services.Protocols.SoapException: Server was unable to process request. ---&gt; System.ArgumentNullException: Value cannot be null.
Parameter name: InString
   at System.Convert.FromBase64String(String s)
   at SlodgeRoutesTools.Utils.Compression.Decompress(String compressedText, Boolean hasHeader) in C:\Users\Stuart\Documents\Visual Studio 2010\Projects\DNN\SlodgeRoutesTools\Utils\Compression.cs:line 68
   at SlodgeRoutesTools.Utils.Compression.DecompressNoHeader(String compressedText) in C:\Users\Stuart\Documents\Visual Studio 2010\Projects\DNN\SlodgeRoutesTools\Utils\Compression.cs:line 96
   at SlodgeRoutesTools.GPXTrackUpload.DoUpload(UploadTrackCredentials credentials, String sportTypeAsString, String sportSubType, String compressedData, Boolean skipDuplicates, Boolean useSecretKeyNotPassword, String collectedFrom) in C:\Users\Stuart\Documents\Visual Studio 2010\Projects\DNN\SlodgeRoutesTools\GPXTrackUpload.cs:line 130
   at GPXSync.UploadUsingPasswordFrom(String sportType, String sportSubType, String compressedData, String collectedFrom)
   --- End of inner exception stack trace ---</faultstring><detail /></soap:Fault></soap:Body></soap:Envelope></pre>

System.NullReferenceException: Object reference not set to an instance of an object.
   at SlodgeRoutesTools.BaseTrackUpload.UserFromDNNCredentials(UploadTrackCredentials credentials) in C:\Users\Stuart\Documents\Visual Studio 2010\Projects\DNN\SlodgeRoutesTools\GPXTrackUpload.cs:line 71
   at SlodgeRoutesTools.BaseTrackUpload.UserIdFromDNNCredentials(UploadTrackCredentials credentials) in C:\Users\Stuart\Documents\Visual Studio 2010\Projects\DNN\SlodgeRoutesTools\GPXTrackUpload.cs:line 65
   at SlodgeRoutesTools.GPXTrackUpload.DoUpload(UploadTrackCredentials credentials, String sportTypeAsString, String sportSubType, String compressedData, Boolean skipDuplicates, Boolean useSecretKeyNotPassword, String collectedFrom) in C:\Users\Stuart\Documents\Visual Studio 2010\Projects\DNN\SlodgeRoutesTools\GPXTrackUpload.cs:line 124
   at GPXSync.UploadUsingPasswordFrom(String sportType, String sportSubType, String compressedData, String collectedFrom)