hi,

i use USBDemo.HEX file. i send it to my PIC using USB PIC programmer (not boot loader). i use;

18f4550
4 MHZ crystal (with 22pF capacitors)
3 parallel 100nF (not polarized) capacitors on pin18
10k resistor on mclr
100nF capacitor between VCC and GND

my pc doesn't recognise the device. nothing happens when i connect PIC to my pc

what is wrong. i couldn't work it. i am workin on it for months and i am going crazy.

thanks