just an idea - for those getting error messages, perhaps one or more of the files has a filename that isnt auctiva compatible? make sure your using filenames that have only letters, numbers, and underscores. no spaces, no special characters, etc. (dont know if auctiva allows dashes or not, so dashes might be okay)
I realize auctiva renames the file once it gets it, but the software for the xfer might have issues if you have spaces, etc.
like i said, just an idea.