Diablo II LOD is copy protected with securom new not by safedisc 4 so I have split off your query to a separate thread. I've also removed your email addy from your second post so as to prevent you from being the victim of spamming.
Now, as to your question, it isn't entirely clear what your problem is.
Are you having problems playing the game from your original cd? Are you having problems making a working back-up copy of your original? Are you having problems in playing the game from a mounted image made from your original cd?
Let us know what your problem really is and give us some details about your system; i.e. operating system, burner/s other d/dvd rom/s; and we'll see what we can do to assist.