Please tell us how you backed up your work in the first place.
If you dragged and dropped using a packet writing software, you will need to re-install that particular packet writing software to access the disc again.
If you used DAO on any software, then you shouldn't need any other software to access the disc.
It also depends on how long ago the backup was made. Cheap media tends to disintegrate in periods as little as 2 months, and there is not much chance of recovering it. Good quality media will outlive the DVD formats useful life