Try this in your template’s topic.php:
<li><?php printf(__('Started %1$s by %2$s'), bb_datetime_format_i18n(get_topic_start_time(array('format' => 'timestamp'))), get_topic_author()) ?></li>
You can use “timestamp” but then you need to convert it from a Unix timestamp using bb_datetime_format_i18n.
Hope that helps.
Chris
i solved it by ….topic_start_time….
thanks.
maybe get_topic_start_time doesn’t work