Vectored interrupt(viq) not getting triggered with lpc 2129 test board

[bala murugan]

Good day to every one,
I do have a problem with external interrupt triggering (EINT1). Iam connecting EINT1 as a Vectored Interrupt source to slot 0. Once executing in the test board of LPC 2129 ARM7 controller, it is not getting triggered when EINT1 switch is pressed.

Iam attaching the code: please help me with debugging the code:?:

******************************************************************

#include <LPC21xx.H>
void EXTINTVectoredIRQ(void) __irq;

void main()
{
IODIR1=0X00FF0000; // make port1 LED pins as o/p
PINSEL0=0X000000c0; //Change GPIO as INT1

VICIntEnable=0X00008000; // Enable INT1
VICVectCntl0=0x0000002F; // connecting the INT1 interrupt channel to slot 0, and enabling the interrupt
VICVectAddr0=(unsigned)EXTINTVectoredIRQ;

IOCLR1=0X00FF0000; // Clear LED's

while(1);
}

void EXTINTVectoredIRQ(void) __irq
{
IOSET1=0X00FF0000; // set leds
EXTINT=0X00000002; // disable EINT 1
VICVectAddr0=0x00000000; // dummy write
}
*****************************************************************
Many thanks in advance !