Using Voice Gateway : Using AWS Polly voices

HI all,

When trying to use an amazon Polly voice, the supporting documentation advises the following.

AWS: The parameter is configured with the value from the 'Name/ID' column in Amazon's Polly TTS table (e.g., "Hans").

However when I attempt this, I get no response working.  Also, I want to use the NTTS version of the voice, which isn't on a table.  Has this table been updated and is no longer the right solution?