Dklab_Realplexor_Exception Error #111: Connection refused

We need person to finish the installation of the script [login to view URL] we are getting such kind of error Dklab_Realplexor_Exception Error #111: Connection refused /home/mafioz/public_html/protected/extensions/realplexor/[login to view URL](233) 221 . $headers 222 . "\r\n" 223 . $body; 224 // Proceed with sending. 225 $old = ini_get('track_errors'); 226 ini_set('track_errors', 1); 227 $result = null; 228 try { 229 $this->_host = '[login to view URL]'; 230 $host = ($this->_port == 443)? "ssl://" . $this->_host : $this->_host; 231 $f = @fsockopen($host, $this->_port, $errno, $errstr, $this->_timeout); 232 if (!$f) { 233 throw new Dklab_Realplexor_Exception("Error #$errno: $errstr"); 234 } 235 if (@fwrite($f, $data) === false) { 236 throw new Dklab_Realplexor_Exception($php_errormsg); 237 } 238 if (!@stream_socket_shutdown($f, STREAM_SHUT_WR)) { 239 throw new Dklab_Realplexor_Exception($php_errormsg); 240 } 241 $result = @stream_get_contents($f); 242 if ($result === false) { 243 throw new Dklab_Realplexor_Exception($php_errormsg); 244 } 245 if (!@fclose($f)) {