It's important that we know exactly what the error message is. In your first post, you claimed that "it could not read files", but that isn't what you said in your latest post. Like Denis said, if the message is that the files could not be read, it often means that you don't have write access to where you are copying them.
Try using the Finder to copy the images to where you want them to live and then use the Add option (instead of Copy) when you import.
Hal
