Hi makeung,
I understand that you're trying to upgrade your company file online to the latest version of AccountRight Server Edition. Let's work together to resolve this. First, ensure all users are logged out and close background applications. Next is to restart the server before upgrading again.
If these steps don't resolve the issue, I recommend getting in touch with our live chat support for more detailed assistance. To connect with our live chat team, you may head on over to http://myob.com/contactus and click the purple speech bubble (lower right-hand corner) to open MOCA. From there, type in "get help from a support agent," and this will give you a link to open a live chat.
Cheers,
Princess