Defraggler and USB Drives

Everytime I have USB thumb drives or my mp4 player hooked up to my computer when I launch Defraggler all of them are Automaticly Removed. Then I have to Exit Defraggler and plug them all back in to access them again, and if I plug them in when Defraggler is on, the drives showup for about 2 seconds then are Automaticly Removed.Is there some way I can fix this?I cant find it on the forum or bug reports...