I've been trying to stop previous messages showing so far i've got the following set but its still showing old messages
// Defines if messages are shown which have been sent before the user entered the channel:
$config['requestMessagesPriorChannelEnter'] = false;
// Defines an array of channelIDs (e.g. array(0, 1)) for which the previous setting is always true (will be ignored if set to null):
$config['requestMessagesPriorChannelEnterList'] = null;
// Max time difference in hours for messages to display on each request:
$config['requestMessagesTimeDiff'] = 0;
// Max number of messages to display on each request:
$config['requestMessagesLimit'] = 0;