Defraggler analysis shows zero fragmented files

Today I ran an analysis with Defraggler, which finished way faster than usual, and returned a zero fragmented files result. I can see in both Windows default defrag program as well as Smart Defrag that I do indeed have several large files fragmented still. It also won't defrag my free space at all. Just yesterday I was able to use Defraggler just fine. This is my C drive having the issue, 140GB NTFS RAID 0 drives. It will still defrag my 60GB FAT32 external drive fine.

Any ideas what could be causing this? I use...

Windows XP

version 1.12.152

Thanks