AT&T Module won't work about opendial HOT 5 CLOSED

You're perfectly right, the online documentation contained a mistake, the 
parameters should be "key" and "secret" (and not "id" and "secret").  It's now 
corrected in the documentation. 

However, the module should work if you provide both the key and secret 
parameters. Are you sure that your application has activated the speech APIs on 
the AT&T portal? On the page with your application 
(https://matrix.bf.sl.attcompute.com/apps), you need to click on the edit 
button, and activate both "Speech - Speech to Text Custom" and "Speech - Text 
to Speech".

They are both activated. I created two different apps, and the credentials from 
neither of them will work.

This is the message OpenDial outputs when I start it:
 [java] [ATTSpeech] WARNING: Thrown exception: com.att.api.rest.RESTException: {"error":"invalid_scope"}
     [java] [DialogueSystem] WARNING: cannot attach ATTSpeech: opendial.arch.DialException: Cannot access AT&T API with the following credentials: ??? --> ???

For some reason it won't work if I only activate those two options, but it will 
work if I check a third option "Speech - Speech To Text Custom". I guess the 
problem is on their side. Thanks very much for the help!

Yes, the "Speech to text Custom" option must be activated as well. Note that in 
most cases, I would recommend using Nuance's speech API rather than AT&T's, 
which can be quite slow and have a lower recognition rate.