Lake Shore model 475 dsp Gausemeter example has error

Hello Guys, 

Now I have Lake Shore model 475 dsp Gausemeter and it has LabVIEW Driver. I use serial port to communicate with it, Then I build a VI using the getting started example SubVI it provided:

Then I double click on the example subVI and click on initialize VI and find it has the error on the VISA read, anyone knows how to solve this?