SEP's SMC Stop with password not working

Hi,

I've been looking for around symantec's website on how to use SMC -stop -p to turn off SEP agents that has tamper protection.

This is what I'v found:

Run:

smc -p MyTamperProtecTionPassword -stop

smc -stop -p MyTamperProtecTionPassword
 

SEP Directory\smc -p MyTamperProtecTionPassword -stop

SEP Directory\smc -stop -p MyTamperProtecTionPassword

But non of them are working.

I also saw Cheetan's post on how to do this but it's also not working, we're using SEP 12.1RU5

Anyone know how to use this in 12.1RU5?
Thanks,