S3C2440A的定时器3中断不产生的问题

//Timer3不能来的原因：
DWORD Timer3_Thread(PVOID pArg)
{
DWORD ret;
while(1)
{
RETAILMSG(1,(_T("[PT486]++Timer3_Thread./n")));
ret = WaitForSingleObject(g_Timer3Event, INFINITE);
RETAILMSG(1,(_T("[PT486]++Timer3 occoured./n")));
if(ret == WAIT_OBJECT_0)
{
set_mode(3,0);
command(0,MASK_HEAT); //stop heating
}
else
{
CloseHandle(g_Timer3Event);
RETAILMSG(1, (TEXT("::: Timer3_Thread Exit. /r/n")));
return 0;
}
InterruptDone(g_Timer3SysIntr);
//return 1;
}
return 1;
//那个return 1放错地方了！姐姐的
}