I want to use a busyIndicator when loading a qml component.... but no indicator appears

qml

Qt Code: 
  1. BusyIndicator {
  2.         id: userEvent_busyInd
  3.         anchors.centerIn: parent
  4.         anchors.verticalCenterOffset: 100
  5.         z: 100
  6.         running: usereventcomponent.status === usereventcomponent.Loading
  7.     }
  8.  
  9.     Action {
  10.         id: action_userEventLogBtn
  11.         enabled:!inSequence
  12.         onTriggered:{
  13.             //----Code to Load User Event Dialog-----//
  14.             UserEventLog.init();
  15.             weld_view.state = "USEREVENT"
  16.             xmui.insertLogMessage(rootItem.getUserName(), "User entered userEventDialog");
  17.         }
  18.     }
  19.  
  20.         State {
  21.             name: "USEREVENT"
  22.             PropertyChanges {target: mask; visible:true; z: 1;}
  23.             PropertyChanges {target: usereventlog_loader; sourceComponent:usereventcomponent;}
  24.         }
  25.  
  26.         Loader{
  27.             id: usereventlog_loader
  28.             width: 1300
  29.             height: 600
  30.             anchors.horizontalCenter: parent.horizontalCenter
  31.             anchors.verticalCenter: parent.verticalCenter
  32.             sourceComponent:  null
  33.             z: 3
  34.         }
  35.  
  36.         Component {
  37.             id: usereventcomponent
  38.             UserEventDialog {
  39.                 id: userEventLog               
  40.             }
  41.         }
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