What we see from the logs is that the "EcranAuthentification" screen class is not detected correctly. This prevents the onEcranAuthentification entry handler to be executed and your transaction code is not executed. This is why nothing changes on your green screen.
See this line in the log :
!Context | 2012-06-06 08:58:26,056 | INFO | http-18080-1/RequestableThread | $clientip=127.0.0.1 | $connector=test3270Connector | $contextid=studio_test3270:test3270Connector | $project=test3270 | $transaction=AuthentTest | $uid=24dbdf7f8f9 | $user=(anonymous) | Detected screen class: 'DefaultScreenClass'
When Convertigo is not able to detect a screen class it will default automatically to the DefaultScreenClass.
Check your Screen class criterias and this should solve the problem.
Also you can use the screen class test detection button to be sure that the criteria you chose are valid for this screen class. see :
Look at the "Show current screen class icon"
Convertigo Support Team.