soap dictionary service problem w/php (works with flash webservice component)

[adam]

hello, im so glad this site has a message board. im making a soap service using php (really amf-php) to a site that has multiple dictionary definitions to choose from. the service i am trying to use is called DefineInDict can be viewed here: http://services.aonaware.com/DictService/DictService.asmx?op=DefineInDict

its a nifty soap service that i can get working from flash authering env using webservice component but due to sandbox issues, thats as far as i can get it to work using flash. so i thought to use php remoting. php makes the connection but one of the two params isnt being sent or not being sent correctly. the error message i get is:
-------
return detail: Parameter not specified (null)
Parameter name: dictId
-------
but i am sending dictId as far as i know
for the moment the value is hardcoded to "wn" which is for the dictionary called worldnet.

the code:

class dictionary {
   function dictionary() {
      $this->methodTable = array(
         "dictionaryControl" => array(
            "description" => "Dictionary service test",
            "access" => "remote"
            "roles" => "role, list", // currently inactive
            "arguments" => array ("arg1", "arg2")
         )
      );
   }
   function dictionaryControl($obj) {
      require_once('nusoap.php');
      $params = array("dictId"=>"wn", "word"=>"earth");
   $client = new soapclient('http://services.aonaware.com/DictService/DictService.asmx?WSDL', 'wdsl' );
      $result = $Proxy->call('DefineInDict', $params );
      return $result;      
   }
}
?>

thanks in advance for any help