Ok I understand I need to use the "viewer Tabbed" and not the "viewer".
So, now I have found where are the options, I have also install an echoserveur on my Network.
But I allways don't succed to connect.
I try to install UltraVNC 1.02 with echoWare. Everythings seems to be ok for the server (menu echoware), but when I Start the Viewer, the button "Option" doesn't do anythings :( . It is then impossible to do anything with the echoWare part! Someone has any idea? I tried to reinstall but it doesn't ...