[AM3359] How to create a timer in SYS/BIOS?

hi, all

I am trying to use the timer  in sys/bios 6.41  at  ICE-AM3359,  but failed.

the err ,i met, is about as below:

just created a new project as following the sys/bios user guide :

Void hwitimerFxn(UArg arg)
{
      System_printf("hello, my timer ~~ \n");
      return;
}

Int main()
{ 
      Task_Handle task;
      Error_Block eb;

      System_printf("enter main()\n");

       Error_init(&eb);

       task = Task_create(taskFxn, NULL, &eb);
       if (task == NULL)      

       {

              System_printf("Task_create() failed!\n");
             BIOS_exit(0);
        }

       Timer_Params timerParams;

        Timer_Params_init(&timerParams);

        timerParams.period = 2000; /* 2 ms */

       timerHandle = Timer_create(Timer_ANY, hwitimerFxn, &timerParams, &eb);
        if (timerHandle == NULL)
        {
          System_printf("Timer create failed");
        }

        BIOS_start(); /* does not return */
        return(0);
}

build success and load the out file into the target.

but could not run the program 

have tryed modify the timer id from "Timer_ANY" to 0,1,and so on , but also failed.   so bad  =.=!

thanks to everyone who gives me any suggestions, i have no idea to debug and so dispirited.

CCS show me the same err point all the time