PIC18F2550 and POT AND USB

Hello,
Is it possible with the command and USB POT resistance to fairs with me he gives nothing from my code:

Code:

---

sendeOhm:
  Pot Porta.0, 255, Ohm1
  USBBufferCount = USBBufferSizeTX   
  USBService                              ' keep connection alive
  USBOut 1, Ohm1, USBBufferCount, sendeOhm ' if bus available, transmit data
  pause 50
  return

---

MFG

AK08154711