I'm trying to make USB audio DAC for home use. The problem is that computer can't see header. I tryed to take an image from "bin" folder of development kit - computer is seeing a USB device with VID & PID. But when I'm taking a HEX image from the same kit, using hex2bin program, and headergui program. Image I'm got doesn't working. I used header.txt from this kit. What's wrong?