求助！！！php调用webservice出错！

$client = new soapclient('http://www.tuc365.cn/SPINTERFACE.asmx?wsdl', true);



$fromcity=$_POST[txtCity];                //出发城市

$tocity=$_POST[txtCity0];                 //抵达城市

$fromdate=$_POST[fromdate];               //出发时间

$roles=$_POST[roles];                     //是否返回

$returnDate=$_POST[returnDate];           //返回时间

$userName=$_POST[username];               //用户名

$clientName=$_POST[clientName];           //乘客姓名

$clientCardId=$_POST[clientCardid];       //乘客证件号

$clientPhone=$_POST[clientPhone];         //乘客电话

$clientType=$_POST[clientType];           //乘客类型

$webname="51pingo.com";                   //网站名称

$filghtId=$_POST[$filghtId];              //航班id 

$linkName=$_POST[txtLinkManName];         //联系人姓名           

$linkPhone=$_POST[txtLinkManPhone];       //联系人电话

$linkAddress=$_POST[txtLinkManAddress];   //联系人电话

$linkEmail=$_POST[txtLinkManEmail];       //联系人email

$webOrderId=date("YmdHis");               //生成订单号

$webUserName="tuc365";

$webmd5="tuc365";



$orderInfo=array($fromcity,$tocity,$fromdate,$roles,$returnDate,$userName,$clientName,$clientCardId,$clientPhone,$clientType,$webname,$filghtId,$linkName,$linkPhone,$linkAddress,$linkEmail,$webOrderId,$webUserName,$webmd5);

$str=$client->call('AddOrders',$orderInfo);

if (!$err=$client->getError()) {

    echo "程序返回:",htmlentities($str,ENT_QUOTES);

} else {

    echo "错误 :",htmlentities($err,ENT_QUOTES);

}

现在的返回信息是
错误 :wsdl error: phpType is struct, but value is not an array: see debug output for details 
请问高手如何解决！php调用webservice这两天刚研究。不是很懂！
------解决方案--------------------
<code>
<?php
header("Content-Type: text/html;charset=utf-8");
$client = new SoapClient('http://www.tuc365.cn/SPINTERFACE.asmx?wsdl');

//GetFlight
$aData = array('webName'=>'','webUserName'=>'','webmd5'=>'tuc365');
$aResult = $client->__call('GetFlight',$aData);

//AddOrders
/*$aData = array(
"fromCity"=>"", 
"toCity"=>"", 
"fromDate"=>"", 
"returnDate"=>"", 
"roles"=>"", 
"userName"=>"", 
"clientName"=>"", 
"clientCardId"=>"", 
"clientPhone"=>"", 
"clientType"=>"", 
"webName"=>"", 
"flightId"=>"", 
"linkName"=>"",