Estoy integrando la API de Google Adwords en mi aplicación web, obtengo un error al ejecutar mi archivo php, es decir

Error:

Warning: curl_setopt(): CURLOPT_FOLLOWLOCATION cannot be activated when safe_mode is enabled or an open_basedir is set in /var/www/vhosts/healthcampaign.in/httpdocs/smscampaign/pages/FacebookAds.php on line 187 
SoapFault Object ( [message:protected] => SOAP-ERROR: Parsing WSDL: Couldn't load from 'https://adwords-sandbox.google.com/api/adwords/cm/v201406/CampaignService?wsdl' : 
failed to load external entity "https://adwords-sandbox.google.com/api/adwords/cm/v201406/CampaignService?wsdl" 
    [string:Exception:private] => [code:protected] => 0 [file:protected] => /var/www/vhosts/healthcampaign.in/httpdocs/smscampaign/pages/FacebookAds.php [line:protected] => 219
    [trace:Exception:private] => Array ( [0] => Array ( 
                                                        [file] => /var/www/vhosts/healthcampaign.in/httpdocs/smscampaign/pages/FacebookAds.php [line] => 219 
                                                        [function] => SoapClient 
                                                        [class] => SoapClient 
                                                        [type] => -> [args] => Array ( 
                                                                                        [0] => https://adwords-sandbox.google.com/api/adwords/cm/v201406/CampaignService?wsdl 
                                                                                        [1] => Array ( [trace] => 1 ) 
                                                                                        ) 
                                                    ) 
    ) 
    [previous:Exception:private] => [faultstring] => SOAP-ERROR: Parsing WSDL: Couldn't load from 'https://adwords-sandbox.google.com/api/adwords/cm/v201406/CampaignService?wsdl' : 
    failed to load external entity "https://adwords-sandbox.google.com/api/adwords/cm/v201406/CampaignService?wsdl" [faultcode] => WSDL )