Hey nguyendanghai_dj, I'm going to tell you the same thing I told Digitaljit.
Submit a ticket at x10hosting.com/helpdesk to have your account backed up tomorrow before the server is wiped clean. Make sure to do this! You must supply your username and (sub)domain in the ticket also.
At this time, if your account was restored, you would only have a half day or so to actualy do anything on it. I know that is better then nothing, but tomorrow, (Well today now.. *sigh*), to server is going to be cleaned out and have all accounts who had a backup made restored. If and when you get your account backed up, and it gets restored after the wipe, your account will work and you will not see the Under Construction page any more.
Also make sure to read the lastest news threads in the News forum.
I hope I cleared this up,
-NedreN