How to add a new Attribute to a Lab Resource artifact

Hello -

I have the need to associate the password information within a Lab resource machine artifact in my RQM project

So, I added a new Attribute to the Machine artifact, with the "Edit Type Attributes", from the "Manage Project Properties"->"Lab Resource Properties" view in my project.

But still I can't see the new field in my lab resources..

Did I missed any step? Any idea what could be wrong?

Thanks in advance

*piero