RTOS/TMS320F28069: How to Jump User Bootloader project?

Tool/software: TI-RTOS

Hi All:

My App project used RTOS Ver: 6.70.1.03, Bootloader code is None-RTOS project.

Follow is my code,but this is not work.

0x3F7FF6 is BEGIN address

void JumpBootLoader(int val)
{
    DINT;
    asm(" NOP");
    asm(" NOP");
    asm(" LB 0x3F7FF6");
}
void JumpBoot(void)
{
    System_atexit( JumpBootLoader );
    Hwi_disable();
    BIOS_exit(0);
}

when i execute this code it always entry to  abort() function,and console show follow message.

[C28xx] ti.sysbios.family.c28.Hwi: line 1032: E_unpluggedInterrupt: Unplugged interrupt flagged: intr# 19
xdc.runtime.Error.raise: terminating execution

Does someone have correct jump process? Thanks.