I've had the "clone error" message before, but I never could figure out exactly what was causing it. A reset made the error go away. I always attributed it to something flaky in the serial port settings that was made right by a cold boot of the radio.
Fortunately, early on when I DIDN'T have the clone error I dumped the radio and saved it. I was able to cold-boot the radio and restore the settings with EVE. You can be a lot more brave when you have a good backup of the radio, something that's not too easy to do when you are getting the "clone error" messare.
The VX-5 requires you to save and/or assign a "template" with basic settings separate from the frequencies/offsets in memory, then you save your memories over (or in context with) the template. Sorry, this is actually easier to understand than it is to explain.
There's lots of good help out there, mostly from EVE users/programmers. You might try posting your question to http://groups.yahoo.com/group/VX5EVE/