How Set up USB in Harmony 2.02b (sulivan.ganter)

Hi, I am trying to set up the USB module (Host MSD) on the PIC32MZ for save data in pendrive device, but the function "USB_HOST_BusIsEnabled(0);" always return : USB_HOST_RESULT_FALSE == (0x00000000). I'm using Harmony 2.02b, MPLAB 3.50 and the developmen..