Lpc2000

Hi all.
I have two devices connected to CAN bus, when I check data stream
between devices, all is ok, devices exchanged information. I read RID/
TID and all registers correctly, but I have a problem with CAN1
receive interrupt. I set register CAN1_IE to 1 (allow only Receiver
interrupt), define routine of RX, enable RX interrupt, but when I send
data from devices 1 to 2, interrupt not occurs, but when I read
RID/TID, information is correct. Connection of
RX to the VIC is 21. Acceptance filter is disabled CAN_AFMR =
0x00000001.  Transmit interrupt works fine.
Any sugestions, how to fix the CAN1 RX interrupt, or can you to place
any correct code, I compare it. Thanks