Lpc2000

Hello
could someone be so kind and say, what is wrong in following code? Or
maybe it is ok, but it doesn't work... I want trigger an interrupt
using UART0. I am using Keil. (UART0 is ok, it sends a string from tab).

thanks in advance

int i,j;
char tab[] = "UART0 is working properly";

void UART0INT() __irq
{
	IO0CLR |= 0x20000;  //clr P0.17 (it's a LED)
	for(i=0;i<5;i++)
	{
		for(j=0;j<50000;j++){}
	}
	send_char_u0('A');
	VICVectAddr = 0x00000000; //dummy write
}

int main(void) 
{
	PLL_ON();
	LED_init();
	VPBDIV = 0x1;   
	UART0_init();                            
	IO0SET |= 0x20000;  //set P0.17
	send_string_u0(tab);
	VICIntSelect = 0x00000000;
	VICVectAddr0 = (unsigned) UART0INT;
	VICVectCntl0  = 0x26;	//UART0	
	VICIntEnable = 0x40;		//bit 6 = UART0
	while(1)
	{

	}
	
	return 0;

}