BB Curve 8300 :: Auto-backup On Remote Hard Drive Lost Data?

I have been religiously doing auto-backup on to a remote hard drive. But now I cannot seem to access any of those files at all. It keeps saying I have no administrative permission to view the files. Even when copied to my desktop, I can't use them to restore.The issue that started this all is that I switched computers. And every time I sync, the desktop program wants to add or delete about 1200 past calendar items. I have been reticent to allow the sync to continue because I did not want to lose data, but today I said, "what the hell" and let it continue. It deleted everything from BOTH the handheld and computer prior to May, when I started using the new computer. So when I try to reinstall the older backup file to retrieve the lost data, now the program won't let me access the files I saved so religiously.