--- a/src/devices/wifi/qsta-wifi-mac.cc	Fri Jan 08 18:04:01 2010 +0100
+++ b/src/devices/wifi/qsta-wifi-mac.cc	Mon Jan 11 12:23:09 2010 +0300
@@ -775,5 +775,13 @@
     }
 }
 
-
+void
+QstaWifiMac::DoStart ()
+{
+  for (Queues::iterator i = m_queues.begin (); i != m_queues.end (); ++i)
+    {
+      i->second->Start ();
+    }
+  WifiMac::DoStart ();
+}
 }  //namespace ns3