For full chat operationality you need LW Pro. With LW standard, I think you can only chat from those uplding from you & if someone sends you a chat invitation (window). However, chat is also restricted to those who have the allow chat preference set to yes. (I don't know how restricted the chat is on LW standard. Perhaps you can only chat to Pro users or at least only those who have set chat pref to yes.) Also sometimes people decide at the time not to chat & cancel the invitation option. And on top of that, many people leave LW running whilst they go out for the day or sleep so they're not at their computers.