JTAG on due to debug usb and uart communication

Moin, i have a little problem

I am using an Atmel-ICE and atmelstudio via visual micro, to debug the due with JTAG.

Now the problem is when I start debugging I can't open the com port to the due to see

if Serial.print is printing hello or give input t the due via the port.

Does anyone experience something similiar or could explain if it's even possible?

The JTAG adapter works nicely with AS but Visual Micro really wants to do debugging with its own serial port based debugging. Are you sure you're getting the sort of debugging you think you are? Which port on the Due are you hooked up to on USB? The programming port or the native port?