cannot communicate with keithley 2450, 2400 or 2611

Hello, 

       I installed a labview 2017. Now for the sourcemeter of Keithley 2450, 2400, and 2611. I used GPIB and kusb to connect to my laptop. I installed the GPIB 488 driver and kusb driver as well. However, the computer did not communicate with the Keithley sourcemeter at all. Even I used a labview program that worked for 2611 in an very old desktop computer in the lab. But in my laptop, the Keithley did not change the voltage as the labview program. Anyone can help on this?

Thanks!