function onChangeTipologiaintervento(executionContext)
{
    debugger;
    var formContext=executionContext.getFormContext();
    if(formContext.getAttribute("new_tipologiaintervento").getValue!=null){ 
    var tipologiaintervento= formContext.getAttribute("new_tipologiaintervento").getValue();
    if (tipologiaintervento == 1 )
    {
        //formContext.getControl("msdyn_workordertype").addPreSearch(filterlookup);
        var fetchxml=  "<fetch version='1.0' output-format='xml-platform' mapping='logical' distinct='true'>"+
        "<entity name='opportunity'>"+
          "<attribute name='name' />"+
          "<attribute name='customerid' />"+
          "<attribute name='estimatedvalue' />"+
          "<attribute name='statuscode' />"+
          "<attribute name='opportunityid' />"+
          "<order attribute='name' descending='false' />"+
          "<filter type='and'>"+
            "<condition attribute='msdyn_workordertype' operator='in'>"+
              "<value uiname='Intervention' uitype='msdyn_workordertype'>{03A27F86-75C7-EB11-BACC-000D3A26E00B}</value>"+
              "<value uiname='Sopralluogo' uitype='msdyn_workordertype'>{E4997BC9-6DBC-EB11-BACC-000D3A4980A5}</value>"+
            "</condition>"+
          "</filter>"+
        "</entity>"+
      "</fetch>";
     formContext.getControl("msdyn_workordertype").addCustomFilter(fetchxml);
      
    }
}
}
it not working and no error is coming 
Any help would be great!!!!!