Just click on someones ID that you want to send to and it'll take you to their profile. On the left hand side click on the link to "PRIVATE MESSAGE USERID" as pictured.......it'll pop up what looks to be something like an email window. Enter your message and send. They'll get notification that they have a private message. To view all your messages, in the upper right corner, click on the "PRIVATE MESSAGES" link and it'll take you to an inbox looking dialog. Let me know if you have further questions or problems getting this to work for you.