Is the CodeWarrior\bin folder readonly?
Check the
"CodeWarrior IDE 5.5 Prefs" (or "CodeWarrior IDE 5.9 Prefs" in later CW versions) in that folder.
If it exist, make sure it is not readonly. If the bin folder has to be readonly, delete it so it gets automatically created in a user specific folder (don't remember which one exactly, search for the file).
Also on the user folders, make sure it is not readonly, and if everything else does not help just delete it so a new default one gets created (you will loose all the ide configuration though).
Daniel