Nero7 Wont Restore

[HughSpence]

I have Nero7 and I backed up a lot of my video projects onto 7 dvds. I've
tried to restore them and all I get is the error message-
Failed to create NBService object. -2147023836: The specified service does
not exist as an installed service.

When I go through the program with disk 1 in the drive I get-
Please insert the source disc with the following volume label in the
selected drive: MyDocs230706. To ensure you have selected the the correct
disc, please compare the following disc ID with the one that can be found in
the file NB.txt located on the root of your backup disc F46B....etc.

I've not been able to restore the files. Can anyone help?