RTC Interrupt Issue

I have implemented RTC and I used controller LPC2148.I'm having an issue while generating code rtc interrupt, it stuck into the rtc interrupt.so can anyone suggest me. `

below is my code, This is my rtc interrupt:

void RTChandler(void)__irq
{
 if(ILR&01)
 //set the flag 
ILR = 0x01;
VICVectAddr = 0x00000000;                       // clear this interrupt from the VIC
//

}

And this is my rtc initialization:

ILR = 0x00;
CCR = 0x11;    

CIIR = 0x00;

VICVectAddr13 = (unsigned)RTChandler;

VICVectCntl13 = 0x20 | 13;

VICIntEnable |= (1<<13); // Enable RTC Interrupt

return 1;