Hi
Thanks for trying that, and
One thing that we can try to get a better idea of some more back end details is to enable the Diagnostic mode on your AccountRight system. To do this you will need to open AccountRight and then press the key combination of Ctrl + Shift +F11. At the top of the screen you will see the words Diagnostic Mode at the top of the screen.
Once you have enabled this mode, then please try opening your online file. As you do it will record all of the background processes onto a diagnostic log, which can be found here (where ** is the specific user name, such as john.smith, and ## is the AccountRight version, such as 2015.1):
C:\Users\**\AppData\Local\MYOB\AccountRight\##\Diagnostics
Are you able to post the contents of this diagnostic log, so that we can review it?