tusb3410 and icd2
hai
In my experience ,Some programmers which is working perfectly in onboard serial port which is usually COM1 may not work perfectly or sometimes not working at all ,when connected through USB to COM adapters or added PCI serial ports.
I am also looking for the cause and solution.
But make sure that you have selected the emulated serial port name COMx in MPLAB ICD settings.
I think microchip USB driver is not an issue in your ICD,because it is serial ICD.
With regards
picstudent