envirement:
xampp 1.5.5, use PHP 5
download the nusoap 2005-07-31, version 0.7.2
code like this :
************************************************
$client = new soapclient('http://219.238.239.166:8005/wappush/SmsService.asmx?WSDL' , true);
$param =array( 'ServiceID' => '7711772'
,'Password' => 'D10ADC3949BA59ABBE56E057F20F883E'
,'SrcNumber' => '6201500271412'
,'DestTermID' => '13911023125'
,'WapURL' => 'wap.downjoy.com'
,'Content' => '1235'
,'ScheduleTime' => ''
,'BatchSendID'=> '',
)
;

$result = $client->call('Send',array('parameters' => $param) );
************************************************
the issue is: when I set the new soapclient(url , true), the request like this:
"<SOAP-ENV:Body><Send xmlns="http://tempuri_org/"><ServiceId/><Password>E10ADC3949BA59ABBE56E057F20F883E</Password>"
you can see I lost the SerivceId's value!!!!!

Really confused for the strange issue...

my mail: seanzhang9999@gmail.com

I'd recommend you to check WSDL produced by server to make sure it contains ServiceID argument for Send() endpoint.