WebService help

[nabeelkhan 0]

I want to use some online web service. but am not expert in this field.

a tutorial on the net said something like this.. (was about NuSoap library)

require_once('nusoap.php');

[code]$wsdl="http://www.xmethods.net/sd/2001/CurrencyExchangeService.wsdl";
$client=new soapclient($wsdl, 'wsdl');
$param=array('country1'=>'usa', 'country2'=>'canada');
echo $client->call('getRate', $param);[/code]

it was using nuSoap library. nut when viewing this page after coding it. nothing appears on screen.

what is the porblem

(if u knwo about PEAR_SOAP, u can help also)