function uploadFileToFTPServer(integrationId, fileObject, subFolder){
    //var INTEGRATION_ID = 'SM_OUT';
    try {
        var ftsRecordId = lookupFileTransferSetupRecordId(integrationId);
        var ftsRecord = record.load({type: 'customrecord_amp_file_transfer_setup', id: ftsRecordId, isDynamic: false});
        var myPwdGuid = ftsRecord.getValue('custrecord_amp_fts_password');
        var myHostKey = ftsRecord.getValue('custrecord_amp_fts_host_key');
        var serverUrl = ftsRecord.getValue('custrecord_amp_fts_server_url');
        var user = ftsRecord.getValue('custrecord_amp_fts_user_id');

        // establish connection to remote FTP server
        var connection = sftp.createConnection({
            username: user,
            passwordGuid: myPwdGuid,
            url: serverUrl,
            directory: ftsRecord.getValue('custrecord_amp_fts_server_path'),
            hostKey: myHostKey
        });
        log.debug('uploadFileTohFTPServer', 'connected');
        log.debug('filename', fileObject.name);
        log.debug('server path', ftsRecord.getValue('custrecord_amp_fts_server_path'));

        connection.upload({
            //directory: ftsRecord.getValue('custrecord_amp_fts_server_path'),
            directory: subFolder,
            file: fileObject,
            filename: fileObject.name,
            //filename: 'test.jpg',
            replaceExisting: true
        });

    } catch (e) {
        log.error('uploadFileTohFTPServer ERROR', e.message + ' - ' + e.stack);
    }
    return true;
}