I have configured all my Servers, Routers and Switches with a notification profile.
At first I used the email notification by setting it up accordingly.I can receive the notification mail well.
But..When trying use Clickatell notification on OpManager, it fails!
I can make a successful test via Clickatell sample code.
I had follow the steps with the following link.
http://www.slideshare.net/opmanagerteam/opmanager-clickatell-integration-for-sms-notification
Of course, I had changed to my username/password and API key.
And the network ACL is allowed between OPManager and Clickatell API server.(HTTP)
Clickatell doesn't works on sms as the actual notification profile when any one device goes down.
Let me know if you need more info.