ultimatedefrag & comodo hard isssue

i have comodo 3 last build and ultimate degrag 1.72
i have only nod32 and comodo installed on xp sp2 with the last updates

well i added ultimatedefrag on trusted program in d+ computer security policy

well i get comodo start to overload my cpu during the defrag
ultimatedefrag start to overload my cpu and my hd , it’s very slow and goes in crash

the only solution is shut down comodo!