Hi, Viero. To chat with other members, do start from their personal profile. Click on the member photo, you can view their personal profile page. On the top right hand side of the webpage, you will see Send Messages and Chat Now options. If those icons are shown in black, then you can send message and start the chat right away. If those are shown in gray, you will need to click on Add to Friends first. And start instant communication after they accept your invitation.