Shame on me!!
completely my mistake. I was thinking that the module was part of the component and responsible by show the chat rooms. I was expecting more integration with CB, but its fine.
I'm really really sorry by this confusion
Now I assigned the Module (mod_blastchatc) to my pages (in "newsflash" position, just to test) and in that pages I only get a "join chat" link.
What I'm doing wrong at this time?