After using several others components for invitation I discovered INVITEX and try it.. I found a problem changing the lang because it was not in one file but inside the programs itself, but I know it is fixed now.
For my surpise in a few days my site propagate for more than 6000 users!! WOAU!
If you have a community portal.. you must use this.
Thank you so much for the great support and well done programming.