--- a/src/devices/wifi/nqap-wifi-mac.cc	Mon Jan 11 12:23:09 2010 +0300
+++ b/src/devices/wifi/nqap-wifi-mac.cc	Tue Jan 12 17:16:04 2010 +0100
@@ -606,8 +606,6 @@
     {
       m_beaconEvent = Simulator::ScheduleNow (&NqapWifiMac::SendOneBeacon, this);
     }
-  m_dca->Start ();
-  m_beaconDca->Start ();
   WifiMac::DoStart ();
 }