Dear Jeff,
Thank you very much for the reply.
It was so stupid of me not to think and post about those important info. Yes, I agree to you, they are very important to help the other members to help me figure out and solve the problem.
On the other hand, our webhost support already replied and they said "the server was down due to server overload".
Thank you for your time. I appreciate the help, really. I hope I am still welcome to post messages if I'll have problem again in the future.
Sincerely,