Defrag won't work

When I click Defrag it says it can build a file list....To be exact it says "Building file list failed "..

So whats the problem or how do I fixx it ?

Thanks

Can you give more info.

What operating system are you using?

Is there anything 'different' about your setup?

Is this the first time you have used defraggler?

I am running Windows XP.

I have run the defragger sucessfully in the past but for some reason it will no work.

i have the same problem, but my defragger don?t work at check and defrag.

I have Vista Home (OEM)

and i used at a admin.

can someone help me???

Thanks!!!!!!

shows "Building file list failed "

i use XP

i did do these modifications:

link removed by moderator. Very old version of xp sp1 shown and involved a lot of registry editing

what went wrong?