--- a/src/devices/wifi/nqsta-wifi-mac.cc	Thu Feb 25 22:45:40 2010 +0300
+++ b/src/devices/wifi/nqsta-wifi-mac.cc	Fri Feb 26 12:11:11 2010 +0300
@@ -686,5 +686,10 @@
       break;
     }
 }
-
+void
+NqstaWifiMac::DoStart ()
+{
+  m_dca->Start ();
+  WifiMac::DoStart ();
+}
 } // namespace ns3