Unable to connect to last.fm api through php - php

Question

I am trying to connect to Last.fm api through php, using the packages downloaded from https://github.com/matto1990/PHP-Last.fm-API .
Here is my code:
public function getTopArtists($methodVars) {
// Check for required variables
if ( !empty($methodVars['user']) ) {
$vars = array(
'method' => 'user.gettopartists',
'api_key' => $this->auth->apiKey
);
$vars = array_merge($vars, $methodVars);
if ( $call = $this->apiGetCall($vars) ) {
if ( count($call->topartists->artist) > 0 ) {
$i = 0;
foreach ( $call->topartists->artist as $artist ) {
$topartists[$i]['name'] = (string) $artist->name;
$topartists[$i]['rank'] = (string) $artist['rank'];
$topartists[$i]['playcount'] = (string) $artist->playcount;
$topartists[$i]['mbid'] = (string) $artist->mbid;
$topartists[$i]['url'] = (string) $artist->url;
$topartists[$i]['streamable'] = (string) $artist->streamable;
$topartists[$i]['images']['small'] = (string) $artist->image[0];
$topartists[$i]['images']['medium'] = (string) $artist->image[1];
$topartists[$i]['images']['large'] = (string) $artist->image[2];
$i++;
}
return $topartists;
}
else {
$this->handleError(90, 'This user has no top artists');
return FALSE;
}
}
else {
return FALSE;
}
}
else {
// Give a 91 error if incorrect variables are used
$this->handleError(91, 'You must include artist variable in the call for this method');
return FALSE;
}
}
But as I try to execute the same, I get a message:
Error 99 - No connection could be made because the target machine actively refused it.