How can I use the PTT button of HW261N & shs2371

Hi ,I buy the HW261N -DC

Plantronics | HW261N-DC

and the shs2371 (usb Push to talk Adaptor).

Plantronics | SHS 2371

And I wnat to get the PTT_Pushed and PTT_Poped event in my  c# code.

But I have been tried the Plantronics Hub program and the program can't find my device.

Could someone give some help to me?

Thanks a lot!

CY-Huang