asterisk users - Aug 2010 - MeetMe will record automaticlly even without 'r' option??

hi,all
    i install MeetMe module on Asterisk 1.6.2.10.
when i use MeetMe to open a conference. even without 'r' option .it
will record too.
is this the bug of this module?

my dialplan is :

[95040]
exten => 95040263007,1,MeetMe(95040,sM,123)

the CLI output is :

*CLI>   == Using SIP RTP CoS mark 5
    -- Executing [95040263007 at 95040:1] MeetMe("SIP/999-00000021",
"95040,sM,123") in new stack
       > Starting recording of MeetMe Conference 95040 into file
(null).(null).

-- 
Thanks & Regards
Sucan