Why won't my iPad 2 connect for messaging?

[anon(10024764)]

I have tuned on iPhone answering and it works just fine! When I try to message , it comes up in a GREEN bubble looks like it is going to send and then I get a message saying-NOT CONNECTED--am I not seeing something simpl??
Please help me!?

 

[dchandler]

Welcome to iMore. You can try this
http://m.imore.com/how-to-set-up-use-sms-mms-relay-send-receive-texts-ipad