Thanks,

I tested one 2.2 tantalum capcitor, because I have one at home, It is too high? There is any problem when using tantalum capacitor? the usb don't work . One new informatin: I am using microchip bootload to write the program, and PIC DEM FS USB (Microchip driver) works with no problems on the note book, only when the MCU is started with HID, windows xp don't recognize the device, on the desktop every thing ok. The internal pull up resistos is good enougth, or is interesting to use external pull up to get high speed usb ?