Hi Kab37,
Try to contact them via private messages. Click the name of the person you'd like to contact. That will take you to their homepage. Then click start conversation, which will bring up a text box you can type your message into. When you want to check your messages, click "messages" beneath your avatar. That will bring up your private messages, most recent first.
I'll send you a private message so you can see what I'm talking about.
Regards,
Tim