STM32 Timer Interrupt Problem mit CooCox IDE

int main(int argc, const char* argv[])

{

  SystemInit();

  TIM_TimeBaseInitTypeDef TIM_TimeBase_InitStructure;

  NVIC_InitTypeDef NVIC_InitStructure;

  SystemInit();

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

  TIM_TimeBase_InitStructure.TIM_CounterMode = TIM_CounterMode_Up;

  TIM_TimeBase_InitStructure.TIM_ClockDivision = TIM_CKD_DIV1;

  TIM_TimeBase_InitStructure.TIM_Prescaler = 1900;

  TIM_TimeBase_InitStructure.TIM_Period = 17999;

  TIM_TimeBaseInit(TIM2, &TIM_TimeBase_InitStructure);

  TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);

  TIM_Cmd(TIM2, ENABLE);

  NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;

  NVIC_Init(&NVIC_InitStructure);

  while (1)

  {

    int i = 0; //HIER IST EIN BREAK-POINT

    i++;

  }

    return 0;

}

void TIM2_IRQHandler()

{

  ; //HIER IST EIN BREAK-POINT

}

NVIC_Init(&NVIC_InitStructure);