When i am in the ds downloader and on the express tab trying to load 2 tunes at once. It will work with the pcm tune but once i do the tcm and choose the original back up i get this message. The crc of your original backupfile does not match that of the tune file. Please fine the correct original backup for this tune, or use an original backup file downloaded from the tool to re create a new tune. And i got my backup straight from the tool and is the one i am trying.