Power Meter U2021XA Trigger Time Out Issue

Hi,
I'm sending the following commands to the U2021XA USB Power Meter sensor using the IOLibrary Version 16.2.15823.0

*CLS
*RST
SYSTem:PRESet WL802DOT11B
SENS1:TRAC:TIME 0.00025
SENS1:SWEEP1:OFFS:TIME 8.258E-06
SENS1:SWEEP1:TIME 0.000208959
CALC1:GAIN:STAT 1
CALC1:GAIN:MAGN 13.0
SENS1:AVER:COUN 1024
TRIG:DEL 0
TRIG:HOLD 1E-06
TRIG:HYST 0
TRIGger:LEVel -3.0
TRIG:SLOP POS
MEASure?

If the Power Meter never triggers then it stops responding.

This is the error:
! VI_ERROR_TMO: A timeout occurred
Visa ErrorCode: 0xBFFF0015 (-1073807339)

The Firmware version on the Power Meter is A.01.00

Am I doing something wrong?

Thank you.