Thread:Extension talk:Push/Push from MW1.16 to MW1.25 fails with Authentication error.

I have the Push extension setup on an old wiki running MW 1.16. In testing the Push feature to a new wiki running MW 1.25, I receive "Authentication at http://processors.wiki.ti.com/api.php failed." This used to work fine when the receiving wiki was running 1.16 as well. I'm assuming there have been significant API changes that are now causing this problem. I can login to the upgraded wiki with the PagePusher account we setup and create pages, so I'm not sure why the Push extension can't do the same. Any advice would be appreciated. Thanks.