So, after hours and hours of wondering lost I found this pdf document that tells how UAC interferes with your set of permissions and how can you fix that: http://www.solarwinds.com/documentation/apm/docs/APMWMITroubleshooting.pdf
In my case, the registry key didn't existed, but you could create it easily.
That key from above does the trick (after all else is set of course!), Cheers!