Thank you Michael,
Thank you Shorty.

First, I was making the MAJOR mistake by selecting the wrong base object (was selecting the ring...shame on me!!).

Yes, the rectangular shape has one side very slightly longer than the other (it is a real model...an emerald cut gemstone), so it gives me some problem when I try to connect or have some tapered form of the same.

Anyway, I really thank you much guys!
Rudy