Peak measurement failed

Hallo,

i have a L2063XA powersensor and want to mess a peak power. I can mess signal power in not pulsed mode, but for pulsed mode i get always an averaged result. Here is my C# code:

double GetPeakPowerValue()

{

   double result;

   try

      {

            _driver.System.Preset();

       var peakChannel = (KtRFPowerMeterChannel)_driver.Channels.get_Item("A");

       var peakMeasurement = _driver.Measurements2.get_Item2("2");

       //set INIT:CONT ON

       peakChannel.Trigger.ContinuousEnabled = true;

        //Normalmode select

               peakChannel.SensorMode = KtRFPowerMeterSensorModeEnum.KtRFPowerMeterSensorModeNormal;

         //Averaging disable

         peakChannel.Averaging.Enabled = false;

         peakMeasurement.OffsetEnabled = false;

         result = peakMeasurement.Read(5000);

       int errorNum = -1;

      string errorMsg = null;

      _driver.Utility.ErrorQuery(ref errorNum, ref errorMsg);

      if (errorNum != 0)

            {

            throw new InvalidOperationException("Invalid Operation on PowerSensor.");

            }

      }

   catch

      {

         throw;

      }

   return result;

}

What must i do more?