You may only contact other members on JADEO once your connection request has been sent and approved by them.
Once those steps have been taken, you can message members by finding them under Connect from the navigation bar or from your Dashboard.
Under your Dashboard click on 'Your Connections' > 'Connections' > 'View' and from there click on 'Message'.
Alternatively, in your Dashboard, in the JADEO Mail box click on 'Compose Message' and select the member you want to message.
You can only message individual members only after becoming connected, but you can always message businesses (business profile pages capability coming soon).