Lpc2000

Hi,
I'm working with gcc, winidea editor and keil2130 development board.
I'm a problem on isr.
There are four isr: two for CAN reception, one for CAN error and one 
for timer 0 elapsed count.
can driver is CANAll1.10
Each IRQ flag works fine but the program flow doesn't jump into isr.
Can someone help me?
I'm a new user and I'm not very expert on ARM irq managment.



thanks in advance

Ubertelli Alberto