LPC1768 problem with timer0

Hi, this is my first thread in this forum and at the beginning i want to apologize for my English OK, I've just written small program with timer0 and interrupt. I want to toggle one of the LED on board, but...It doesn't work and I really don't know what's wrong with this code. Each LED is lit and nothing more... Could you help with it ? Thank you in advance and best regards :)

#ifdef __USE_CMSIS
#include "LPC17xx.h"
#endif

#include <cr_section_macros.h>
#include <NXP/crp.h>

// Variable to store CRP value in. Will be placed automatically
// by the linker when "Enable Code Read Protect" selected.
// See crp.h header for more information
__CRP const unsigned int CRP_WORD = CRP_NO_CRP ;

// TODO: insert other include files here

// TODO: insert other definitions and declarations here
int main(void)
{
    LPC_GPIO2->FIODIR |= 1 << 29;
    LPC_SC->PCONP |= 1 << 1;
    LPC_SC->PCLKSEL0 |= 1 << 3;
    LPC_TIM0->TCR |= 0x00000002;
    LPC_TIM0->MCR |= 0x00000003;
    LPC_TIM0->MR0 |= 6000000;
    NVIC_EnableIRQ(TIMER0_IRQn);
    LPC_TIM0->TCR |= 0x00000001;
    while(1){}
    return 0 ;
}

void TIMER0_IRQHandler (void)
{
    if((LPC_TIM0->IR & 0x01) == 0x01)
    {
        LPC_TIM0->IR |= 1 << 0;
        LPC_GPIO2->FIOPIN ^= 1 << 29;
    }
}