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PIC18f4550 USB interface Problem

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amardeep singh

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Hi
i am using MPLAB IDE + C18 Complier and try to interface USB with PIC18f4550 through PC(Computer)
i download this file http://ww1.microchip.com/downloads/en/DeviceDoc/MCHPFSUSB_Setup_v1.3.exe
and load MCU C:\MCHPFSUSB\fw\_factory_hex\picdemfsusb.hex. this hex file after program i listen desire voice but when i insert USB connector again into port i listen the USB sound twice and driver are not installed.
please help what i do next
 

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