This connector is disabled

$ip = md5($_SERVER['REMOTE_ADDR']);
$sql ='select ips.session_id from #__session ips '
. 'join #__session uip on uip.session_id = ips.username '
. 'join #__users usr on usr.id = uip.userid '
. 'where ips.session_id =\'' .$ip . '\' and usr.gid > 18 '
. 'and uip.time > ' .$expired_time;

That's where it goes wrong ....

The $ip doesn't match the session_id in the databse.

You can 'hack' it to change the following code

if(isset($ip_recorded_for_jusr))
{
$Config['Enabled'] = true;
}
else
{
$Config['Enabled'] = false;
}
$Config['Enabled'] = true; // <--- this is added

Be carefull, there is no login check with this hack!!!!!!!