There are two different chat systems on the chat bar. The lower right chat is only for 'friends.' There is a Chatroom link at the lower left. Click on it then select the PCS and TBI chatroom. Be sure to select the chatroom with participants. Last week, Will set up a second chatroom. There is a PCS and TBI chatroom and a PCS & TBI chatroom.

If you don't see the chat bar, click on the blue cloud at the lower right. The chat bar will expand. Then you will see the Chat at the right and the Chatroom and the left.