Multi timer in multi task

Hi my friends
I work with the mc60 module in all in one mode
I run the watchdog example in sdk 1.8 with a subtask, no problem
My program has three subtasks I have a problem when I apply the timer to the other two subtasks.
The problem is that the timer works correctly in the main task and subtask 1, but it does not work in subtask 2 and subtask 3.
please guide me

Try adding this interface to your task: Ql_OS_GetMessage(&msg);

This interface will allow tasks to be scheduled out. If it is not added, the system may be stuck in the current process