how can i overcome this fatal error when i was run this SOAP API?

i was used the sms API in my Bluehost hosting. when i was run the code it shown like

Fatal error: Uncaught SoapFault exception: [WSDL] SOAP-ERROR: Parsing WSDL: Couldn't load from 'http://smeapps.mobitel.lk:8585/EnterpriseSMSV3/EnterpriseSMSWS?wsdl' : failed to load external entity "http://smeapps.mobitel.lk:8585/EnterpriseSMSV3/EnterpriseSMSWS?wsdl" in /storage/ssd4/825/11729825/public_html/sms/sms_backend.php:58 Stack trace: #0 /storage/ssd4/825/11729825/public_html/sms/sms_backend.php(58): SoapClient->SoapClient('http://smeapps....') #1 /storage/ssd4/825/11729825/public_html/sms/sms_backend.php(101): getClient() #2 /storage/ssd4/825/11729825/public_html/sms/sms_backend.php(27): createSession('', 'esyyyyy', 'xxxx', '') #3 {main} thrown in /storage/ssd4/825/11729825/public_html/sms/sms_backend.php on line 58

here this is my code

<?php



$username = $_REQUEST['username'];
$password = $_REQUEST['password'];
//$alias = $_REQUEST['alias'];
$message = $_REQUEST['message'];
$number = $_REQUEST['numbers'];





$session=createSession('',$username,$password,'');
sendMessages($session,'XXXX',$message,$number,0); // 1 for promotional messages, 0 for normal message 
closeSession($session);


$session=createSession('',$username,$password,'');
getMessagesFromShortCode($session,"shortcode");
getMessagesFromLongNumber($session,"longnum");
closeSession($session);





//create soap client
function getClient()
{





ini_set("soap.wsdl_cache_enabled", "0");
    $client = new SoapClient("http://smeapps.mobitel.lk:8585/EnterpriseSMSV3/EnterpriseSMSWS?wsdl");

    return $client;
    
    

}


//serviceTest
function serviceTest($id,$username,$password,$customer)
{

    $client = getClient();

    $user = new stdClass();
    $user->id = '';
    $user->username = $username;
    $user->password = $password;
    $user->customer = '';

    $serviceTest = new stdClass();
    $serviceTest->arg0 = $user;

    return $client->serviceTest($serviceTest);

}

//create session
function createSession($id,$username,$password,$customer)
{

    $client = getClient();

    $user = new stdClass();
    $user->id = $id;
    $user->username = $username;
    $user->password = $password;
    $user->customer = $customer;

    $createSession = new stdClass();
    $createSession->user = $user;

    $createSessionResponse = new stdClass();
    $createSessionResponse = $client->createSession($createSession);

    return $createSessionResponse->return;

}

//check if session is valid
function isSession($session)
{

    $client = getClient();

    $isSession = new stdClass();
    $isSession->session = $session;

    $isSessionResponse = new stdClass();
    $isSessionResponse = $client->isSession($isSession);

    return $isSessionResponse->return;
}

//send SMS to recipients
function sendMessages($session,$alias,$message,$recipients,$messageType)
{
    $client=getClient();

    $smsMessage= new stdClass();
    $smsMessage->message=$message;
    $smsMessage->messageId="";
    $smsMessage->recipients=$recipients;
    $smsMessage->retries="";
    $smsMessage->sender=$alias;
    $smsMessage->messageType=$messageType;
    $smsMessage->sequenceNum="";
    $smsMessage->status="";
    $smsMessage->time="";
    $smsMessage->type="";
    $smsMessage->user="";

    $sendMessages = new stdClass();
    $sendMessages->session = $session;
    $sendMessages->smsMessage = $smsMessage;

    $sendMessagesResponse = new stdClass();
    $sendMessagesResponse = $client->sendMessages($sendMessages);

    return $sendMessagesResponse->return;
}

//send Unicoded SMS to recipients
function sendMessagesMultiLang($session,$alias,$message,$recipients,$messageType)
{
    $client=getClient();

    $smsMessageMultiLang = new stdClass();
    $smsMessageMultiLang->message=$message;
    $smsMessageMultiLang->messageId="";
    $smsMessageMultiLang->recipients=$recipients;
    $smsMessageMultiLang->retries="";
    $smsMessageMultiLang->sender=$alias;

    $smsMessageMultiLang->messageType=$messageType;
    $smsMessageMultiLang->sequenceNum="";
    $smsMessageMultiLang->status="";
    $smsMessageMultiLang->time="";
    $smsMessageMultiLang->type="";
    $smsMessageMultiLang->user="";

    $sendMessagesMultiLang = new stdClass();
    $sendMessagesMultiLang->session = $session;
    $sendMessagesMultiLang->smsMessageMultiLang = $smsMessageMultiLang;

    $sendMessagesMultiLangResponse = new stdClass();
    $sendMessagesMultiLangResponse = $client->sendMessagesMultiLang($sendMessagesMultiLang);

    return $sendMessagesMultiLangResponse->return;
}

//send Campaign SMS to recipients
function sendCampaignMessages($session,$alias,$message,$recipients,$datetime,$multilanguage,$messageType)
{
    $client=getClient();

    $smsCampaignMessage = new stdClass();
    $smsCampaignMessage->message = $message;
    $smsCampaignMessage->messageId = "";
    $smsCampaignMessage->recipients = $recipients;
    $smsCampaignMessage->retries = "";
    $smsCampaignMessage->sender = $alias;
    $smsCampaignMessage->messageType=$messageType;
    $smsCampaignMessage->sequenceNum = "";
    $smsCampaignMessage->status = "";
    $smsCampaignMessage->time = $datetime;
    $smsCampaignMessage->type = "";
    $smsCampaignMessage->user = "";
    $smsCampaignMessage->esmClass = $multilanguage;
    
    $sendCampaignMessages=new stdClass();
    $sendCampaignMessages->session=$session;
    $sendCampaignMessages->smsCampaignMessage=$smsCampaignMessage;
    

    $sendCampaignMessagesResponse = new stdClass();
    $sendCampaignMessagesResponse = $client->sendCampaignMessages($sendCampaignMessages);

    return $sendCampaignMessagesResponse->return;
}

//renew session 
function renewSession($session)
{

    $client = getClient();

    $renewSession = new stdClass();
    $renewSession->session = $session;

    $renewSessionResponse = new stdClass();
    $renewSessionResponse = $client->renewSession($renewSession);

    return $renewSessionResponse->return;

}


//close session
function closeSession($session)
{

    $client = getClient();

    $closeSession = new stdClass();
    $closeSession->session = $session;

    $client->closeSession($closeSession);

}

//retrieve messages from shortcode
function getMessagesFromShortCode($session,$shortCode)
{

    $client = getClient();

    $getMessagesFromShortCode = new stdClass();
    $getMessagesFromShortCode->session = $session;
    $getMessagesFromShortCode->shortcode = $shortCode;

    $getMessagesFromShortcodeResponse = new stdClass();
    $getMessagesFromShortcodeResponse->return = "";
    $getMessagesFromShortcodeResponse = $client->getMessagesFromShortcode($getMessagesFromShortCode);
    
    if(property_exists($getMessagesFromShortcodeResponse,'return'))
    return $getMessagesFromShortcodeResponse->return;
    
    else return NULL;

}

//retrieve delivery report
function getDeliveryReports($session,$alias)
{

    $client = getClient();

    $getDeliveryReports = new stdClass();
    $getDeliveryReports->session = $session;
    $getDeliveryReports->alias = $alias;

    $getDeliveryReportsResponse = new stdClass();
    $getDeliveryReportsResponse->return = "";
    $getDeliveryReportsResponse = $client->getDeliveryReports($getDeliveryReports);
    
    if(property_exists($getDeliveryReportsResponse,'return'))
    return $getDeliveryReportsResponse->return;
    
    else return NULL;

}

//retrieve messages from longnumber
function getMessagesFromLongNumber($session,$longNumber)
{

    $client = getClient();

    $getMessagesFromLongNumber = new stdClass();
    $getMessagesFromLongNumber->session = $session;
    $getMessagesFromLongNumber->longNumber=$longNumber;

    $getMessagesFromLongNumberResponse = new stdClass();
    $getmessagesFromLongNumberResponse->return = "";
    $getMessagesFromLongNumberResponse = $client->getMessagesFromLongNumber($getMessagesFromLongNumber);
    
    if(property_exists($getMessagesFromLongNumberResponse,'return'))
    return $getMessagesFromLongNumberResponse->return;
    
    else return NULL;
    
}
 
 ?>

this code works in Localhost very well… but in my hosting (Bluehost) it was shown fatal error like that.

can any one help me to resolve this error??

Thanks in advance