Hi Guys:
Finally got it.
Turn out to be the tape is not align correctly and causing the tape guide worn out a bit. When elevator go to bottom landing, it did not see the DLZ first. It pick up the DFLZ then DLZ, that is why the elevator stop then leveling in to the floor.
But it never show any error code.
Thank you very much for all the help.
Also, still looking for the wizard software for the computer. It would make life a little easier.
Ken