Thanks for your advice but later after I try it again IT WORKS!!!
yeah thanks for the help this is how it works;
1.Restart computer,
2.Press F8 quickly to go to safe mode,
3.Press Ctrl+Alt+Del in the logon screen,
4.Insert Administrator and leave the password blank,
5.Create new Admin user account thats it!!
you are now can logon as computer administrator
but the last problem is I LOST ALL MY FILES AND DATAs
but thanks anyway the important thing is I GOT my ADMIN USER ACC back! but if GURU have any solution Im very appreciate any help comes from The True IT
my problem now is to recover all my files that lost!?
anyway but thanks to JJ 3000 you are very helping