interrupt on USB com

Hi,

I am trying to set-up a USB Interupt on a 18F4550. I want a programm interruption on USB bus activity. My problem it seems that i don't haveset the right register.

Ofr example : how do you access to UIE register in PBP ?


here is my

Code:

---

DEFINE OSC 48                    ' oscillateur ‡ 48 Mhz
 

LEDalim VAR PORTA.4                ' LED alim
USBbuffer var byte
USBcount var byte
 
USBINIT ' initialise USB...

INTCON = %10000000 ' Enable RB0 interrupt

PIR2=0

ASM
 bsf UIE,2  ' Is it right ?
endASM

ON INTERRUPT GOTO myint

loop
USBservice          ' a simple loop /keep alive USB
goto loop

disable
myint:
DoUSBIn:
  USBCount=1  ; 1 byte
  USBSERVICE                                    ' keep connection alive
  USBIN 3, USBBuffer,USBCount,DoUSBIn  ' read data, if available
 
 
DoUSBOut:
  USBCount=1  ;
  USBSERVICE                                    ' keep connection alive
  USBout 3, USBBuffer,1,DoUSBOut  ' send data, if available
 
PIR2=0 
 
  resume
enable

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Is there something wrong ?

For information : i used CDC comminication ( virtual COMport) and usually the USB communication work fine.