Disk defrag not working

I tried defragmenting my hard disks but just the console pops up and nothing happens..

I’m using a Microsoft XP Home Edition [sp #3] (genuine)
….I have tried the possible ways

--- Tried to defrag using the command mode (says windows cannot connect to the defrag engine)
--- Used Safe Mode but no success (same thing just the console and nothing after that)
--- Reinstalled my OS (still problem persists)
--- Tried using external free software to defrag (no success)
(Also did the re-entry of the dfrgsnap.dll and dfrgui.dll in the registry server)..


Please somebody tell me what to do to solve this problem…..