uart irq_handler

Hi everyone.
I've got a problem using the UART irq_Handler.

I'm working with an STM32E ev board and i want to receive data from an AHRS throught the COM port.
I've to manage a message of many bytes and i need to use an UART interrupt handler to pass charater to a task that will collect all the bytes of the mesage and then, when complete, send it to another task.
The problem is that i never get into the UART IRQ_Handler routine and i cannot understand why.

Here is the code:

/*----- Usart Interrupt Service routine----- */

void USART2_IRQHandler(void)
{
    char *char_ptr;
    char char_rec;

     _init_box(charpool,sizeof(charpool),sizeof(U32));

     while(1){
        os_mbx_init(MsgBoxA,sizeof(MsgBoxA));
        char_ptr = _alloc_box(charpool);
        char_rec = getkey();
        char_ptr = &char_rec;
        os_mbx_send(MsgBoxA,char_ptr,0xffff);
        GLCD_displayStringLn(Line4, "  Get some  ");
        }
}
/*----------------------------------------------------------------------------
*   Task getAhrs: receive the character, then switch the state of the machine and collect the
*                  payload character in a buffer to send to the manage task
*---------------------------------------------------------------------------*/

__task void getAhrs(void){

        char *car_rec;
        U32 *buf_ptr;

        os_mbx_init(MsgBoxB,sizeof(MsgBoxB));              /*init the mailbox B */

        GLCD_displayStringLn(Line3, "In the task get");

        while(1){
                switch (buf_count){
                        case 0: buf_ptr = _alloc_box(bufpool_0);        /*memory allocation */
                                        break;
                        case 1: buf_ptr = _alloc_box(bufpool_1);
                                        break;
                        case 2: buf_ptr = _alloc_box(bufpool_2);
                                        break;
                        }

                os_mbx_wait(MsgBoxA,(void**)&car_rec,0xffff);                  /*receive the
                                                                             mailbox from the
                                                                                 IRQ_hanlder*/
                current_char = *car_rec;

The code then goes on managing the character and colecting it into a buffer pointed by buf_ptr.

When I ebug it I get o errors, but, using the breakpoints i can see that it never step into the IRQ_Hanler.

A clarification:

I set up the UART in the starter task that is as follow:

/*----------------------------------------------------------------------------
 *   Task starter:  init and configure the UART and create all the tasks
 *---------------------------------------------------------------------------*/
__task void starter (void){

        USART_InitStructure.USART_BaudRate = 115200;
        USART_InitStructure.USART_WordLength = USART_WordLength_8b;
        USART_InitStructure.USART_StopBits = USART_StopBits_1;
        USART_InitStructure.USART_Parity = USART_Parity_No;
        USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
        USART_InitStructure.USART_Mode = USART_Mode_Rx;

  /* Configure USART2 */
        USART_Init(USART2, &USART_InitStructure);

        USART_ITConfig(USART2, USART_IT_RXNE, ENABLE); /* enable usart2 receive interrupt*/
        USART_Cmd(USART2, ENABLE);

        state = IDLE;           /*state machine in IDLE state */

        _init_box(mpool,sizeof(mpool),sizeof(U32));               /*mailboxes memory spaces */
        _init_box(bufpool_0,sizeof(bufpool_0),sizeof(U32));
        _init_box(bufpool_1,sizeof(bufpool_1),sizeof(U32));
        _init_box(bufpool_2,sizeof(bufpool_2),sizeof(U32));

        GLCD_setBackColor(Green);
        GLCD_setTextColor(Red);

        os_tsk_create(printLCD,1);
        os_tsk_create(manageAhrs,2);
        os_tsk_create(getAhrs,3);

        os_tsk_delete_self();
}

If anyone coul explain me where i wrong... i've also tried to look at some eamples but also them did not work.. It's a problem of my board or maybe i don't set something very important?
Thanks