I am using privatmsg module.
private message is not showing in messages page but with permission of 'showing read all messages', user/uid/messages show the messages list.
I have check the all permission its ok.
After some debugging, i found that in privatemsg.pages.inc file $query = _privatemsg_assemble_query('list', $account, $argument); does not return any result.
I will be very grateful getting any suggestion..