You should have access to the data on your CD even if the CD was not finalized. Are you sure that the disk is that you written information on it? Try to look at the face of the cd where the data is recorded and if you see a circle it means that the data was burned. If you see no marks on that face it means that the cd was not written.
Try to use another CD-ROM , maybe yours is damaged.
If you can't solve the problem and you are absolute sure that this is the CD with data contact us again.