Cannot delete even a file in wm6

[otivaeey]

it says "Cannot delete xxx :Access is denied. Be certain that the file is not write-protected and is not currently in use."

[ather90]

which file are u trying to delete.probably its a system file or a read only file..or its associated to a program that is currently running

[otivaeey]

which file are u trying to delete.probably its a system file or a read only file..or its associated to a program that is currently running

sorry for misleading, I meant every file. Even though they are not use, blablabla

Still after i restart the phone, any file still cannot be deleted.