Thanks a lot for the information cfoe and I have managed to upgrade ISPConfig version from version 3.0.4.5 to version 3.0.4.6 successfully without any data loss.
But, it turns out after I try to upgrade the version is still not resolve my problem like that in Thread:
http://www.howtoforge.com/forums/showthread.php?t=45905.
Thread it in the bottom of my post with the ID "m4l41k4t" I used ISPConfig version 3 not version 2.