Login - you can go to SETTINGS / Data Sources / Configure Accounts... Select Commsec. UN-Check the Save Password checkbox. Then restart MT.
NOTE however, MT should automatically detect a bad password, if that is the problem. Whatever the problem is, I would like to see the debug files related to it. If you could do the following, it would help:
On the Dashboard, bottom right - change logging level to 100
Try logging into Commsec - Repeat an extra time if not sure if it went through the whole process after the logging level was changed
go to FILE / Export Settings.
Leave the checkboxes already checked, and also check LOG FILE.
Export,
go to C:\Users\<Your Windows Login here>\AppData\Local\2GK\Medved Trader\Temp\Streamers and zip up all the files who's name starts with "COMMSEC"
then email me the exported file and the zipped up commsec files.
Thanks