systic timer problem???

[Elimathew]

hey i am using systic timer to blink a led my core frequency is 100mhz so typically between 2 interrupts there is 1ms accordingly i have to tried to blink led but to no avail am i missing something

#include "LPC17xx.h"
#include <stdint.h>

volatile uint32_t msTicks = 0; 
volatile uint32_t  curTicks;



void SysTick_Handler(void)

{

msTicks++;

}


 void Delay (unsigned long  dlyTicks)

{

curTicks = msTicks;

while ((msTicks - curTicks) < dlyTicks);


}

int main (void) 
{

SystemInit();

 SysTick_Config(SystemCoreClock / 1000);
	 
    

LPC_SC->PCONP |= ( 1 << 15 ); // power up GPIO
LPC_GPIO1->FIODIR |= 1 << 29; // puts P1.29 into output mode.
while(1)
{
	LPC_GPIO1->FIOPIN |= 1 << 29; // make P1.29 high

Delay(500);
LPC_GPIO1->FIOPIN &= ~( 1 << 29 ); // make P1.29 low
Delay(500);
}
	



}