A -61 error is a "Write Permissions Error" where the Macintosh System is
keeping the active application from making changes to a file or directory
structure. If the problem is occurring in the Control Panel, this suggests
a locked file somewhere in the System Folder (basically, no System file
should ever be locked) or a corrupt Desktop.
If all of the System files are unlocked and the problem persists, we
recommend trashing and reinstalling the System Folder using the Installer
on your system disks.