Problemas con la línea de traducción en PHP

echo ".$tr->translate($message,'english','spanish').<br>\n";

 echo $tr->translate($message,'english','spanish')."<br>\n";

echo "En Castellano: <br />\n" .$tr->translate($message,'english','spanish')."<br />\n";

<?php
/*******************************************************************************
** Class: babelfish
** Purpose: Translate text using Altavista Babelfish
** Filename: babelfish.class.php
** Author: Vedanta Barooah
** Author Email: vedanta . barooah @ gmail . com
** Date: June 19 2005
** Last Updated: June 27 2007
** 
** Other Contributors:will@jetlabs.com,stefm34@wanadoo.fr,Nikolay Kubarelov <admin@gramophon.com>
********************************************************************************/

/* if ! PHP5 */
if (!function_exists('http_build_query')) {
   function http_build_query($formdata, $numeric_prefix = "")
   {
       $arr = array();
       foreach ($formdata as $key => $val)
         $arr[] = urlencode($numeric_prefix.$key)."=".urlencode($val);
       return implode($arr, "&");
   }
}
/* translate text using altavista babelfish */
class babelfish{
    /* array to store language names */
    var $languages      =   NULL;
    /* stores the altavista babelfish url*/
    var $babel_url      =   NULL;
    /* stores the search regex  (see readme for details) */
    var $search_regex   =   NULL;
    /* stores the data to be posted in an array (see readme for details) */
    var $post_data      =   NULL;
    /* stores the supported translation combination(s) */
    var $valid_translate   =   NULL;
    
    /* proxy support 
    **
    */
    var $useProxy           =    FALSE;
    var $proxyServer       =    NULL;
    var $proxyPort           =    NULL;
    var $timeOut           =    NULL;
        
    /* class constructor */
    function babelfish($url=NULL,$postdata=NULL,$regex=NULL){
        /* list of languages */
        $this->languages    =       array(
                                        'en'    =>    'english',
                                        'zh'    =>    'chinese',
                                        'zt'    =>    'chinese-traditional',
                                        'nl'    =>    'dutch',
                                        'fr'    =>    'french',
                                        'de'    =>    'german',
                                        'el'    =>    'greek',
                                        'it'    =>    'italian',
                                        'ja'    =>    'japanese',
                                        'ko'    =>    'korean',
                                        'pt'    =>    'portuguese',
                                        'ru'    =>    'russian',
                                        'es'    =>    'spanish'
                                );
        /* list of valid translations */
        $this->valid_translate=array(
            'zt_en','en_zh','en_zt','en_nl','en_fr',
            'en_de','en_el','en_it','en_ja','en_ko',
            'en_pt','en_ru','en_es','nl_en','nl_fr',
            'fr_en','fr_de','fr_el','fr_it','fr_pt',
            'fr_nl','fr_es','de_en','de_fr','el_en',
            'el_fr','it_en','it_fr','ja_en','ko_en',
            'pt_en','pt_fr','ru_en','es_en','es_fr'
        );

        /* babelfish service url */
        if($url!=NULL)
            $this->babel_url=$url;
        else
            $this->babel_url="http://babelfish.altavista.com/tr";
        /* data that is posted to the babelfish site */
        if($postdata!=NULL)
            $this->post_data=$postdata;
        else
            $this->post_data=array(
                        'doit'=>'done',
                        'intl'=>'1',
                        'tt'=>'urltext',
                        'trtext'=>NULL,
                        'lp'=>NULL
            );
        /* search for the translated text using this regex */
        if($regex!=NULL)
            $this->search_regex=$regex;
        else
             #$this->search_regex='/<td bgcolor=white class=s><div style=padding:10px;>(.*)<\/div><\/td>/';
             $this->search_regex='/<td bgcolor=white class=s><div style=padding:10px;>(.*)<\/div><\/td>/sm';
    }
    
    /* set proxy settings */
    function setProxy($proxyServer, $proxyPort, $timeOut=15){
        $this->useProxy = true;
        $this->proxyServer = $proxyServer;
        $this->proxyPort = $proxyPort;
        $this->timeOut = $timeOut;
    }
    
    /* perform babelfish translation */
    function translate($text,$from_language,$to_language,$forceUTF8=true){
        $f=array_search(strtolower($from_language),$this->languages);
        if(!$f){die("***error: source language not found");}
        $t=array_search(strtolower($to_language),$this->languages);
        if(!$t){die("***error: result language not found");}
        $l=$f.'_'.$t;
        if(!in_array($l,$this->valid_translate)){die("***error: cant translate with given combination ($l)");}
        $this->post_data['trtext']=$text;
        $this->post_data['lp']=$l;
        $query=http_build_query($this->post_data);
        $ch=curl_init();
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
        curl_setopt($ch, CURLOPT_URL, trim($this->babel_url));
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $query);
        curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (babelfish.class.php)");
        curl_setopt($ch,CURLOPT_ENCODING , "UTF-8");
        /* use proxy if required */
        if($this->useProxy){
            curl_setopt($ch,CURLOPT_PROXY,$this->proxyServer.":".$this->proxyPort);
            curl_setopt($ch,CURLOPT_TIMEOUT,$this->timeOut);    
        }
        $output = curl_exec($ch);
        curl_close($ch);
        $result=preg_match($this->search_regex,$output,$match);
        if(count($match)!=0){
            return strip_tags($match[0]);
        }else{
            return '** error : babelfish.class.php returned nothing';
        }
    }
}
/* end of class  */
?>

echo $tr->translate($message,'english','spanish')."<br>\n";