Go to Tools>Options>Chat & tick the option to chat & press Apply. You can also view other people who have chat enabled by right-clicking on the top of the columns & choose show chat. More of an idea can be obtained from here: 1. How do you receive a chat message in Limewire?, 2. Setting Chat up, 3. How to use Bitzi Web Lookup ... & How to use Magnet Links & Direct Connect/Chat