While doing backup it appears to be coping/looping but when done does not come on screen saying Backup Successful and give me that nice link to the backup I have seen before, and as I saw in your instructional video. I have the following installed as well WP Super Cache. Could there be a conflict with this? Have had Hyper Cache before.
Also, I have a code 503 maintenance screen on while I work on a few things, would it be responsible?