Hi,
It should work.
did you placed the parameter at the right profile file (start profile of each instance). Use
Autostart=1
Remember to put at least one break line at the end of the profile file.
And no comment after the parameter in the same line.
I suggest to put this parameter at the top of the file to make sure, there is no other problem at the profile file.
If there is ASCS instance and dialog instance, put a delay on the dialog instance service.
You need to make sure ASCS or SCS instance is started first.
You need to restart the service after changing the start profile.
If it is a newer system 73x and higher (maybe also 71x), there is no start profile. And you should make the changes on the instance profiles.