Copying a DVD-R

I have a set do DVD’s (home videos) that were put together from a video editor that I am trying to copy. I can’t find the guy who originally did them, so I am I figured I would give it a shot. They were burned onto a DVD-R, and when I try to copy, it just stops. I have a Teac DV-W58E burner…any suggestions? I tried even copying the files onto my hard drive and going from there, but no luck. I am assuming there is some copywright on there…my wife has been asking me to do this for months now with no luck…help…

thanks in advance!!

Shouldn’t have any protection on it. I’d try ImgBurn, Read mode followed by Write mode.