Restricting access to certain Softwore componenst to users

Hello Experts,

I am trying to find a way to restrict access to certain SC to selected users on Signle stack Java PI. I started with Michał Krawczyk's blog entry:

http://scn.sap.com/community/pi-and-soa-middleware/blog/2005/05/25/xi-how-to-add-authorizations-to-repository-objects

But after implementing this solution and assigning this role to user I can still modify choosen SC, I also created a role to restrict access to all SC and still no effect.

I read that profile parameter: com.sap.aii.ib.server.lockauth.activation has to be set to true.

But there is no exchange profile in single stack, so where I can find this parameter in Single Stack Java PI ?

Perhaps there is another way to restrict access to certain object then this ?

Thank you in advance for your answers