As philamber said "Diablo 2 (securom new)"
Have a quick search around the site, you will find numerous guides on backing up SecuROM new protected discs.
You probably should take a look at other posts and compare their style of posting with yours... It might be worth stating what version of CCD you are using... what speed you used etc..
Whilst the people on here are awesome at answering questions and fixing problems - they can't guess your configuration...
I know this place is a little daunting, but after a couple of searches, a few cups of tea and a lot of reading - you should be a master of backing-up!
I look forward to you posting your success story!