Windows 7 Explorer cannot see files on disk

I burned a disk with roxioburn, maybe a year ago.  I have windows 7 on my 2010 dell.  You can look at the disk and see that it burned.  When I insert the disk and click on Roxio, it shows the disk is almost full.  When I click the Roxio menu item Explore, it shows the disk is empty and ready to burn.  I can copy the disk and you can see 6 files in the Roxio temp folder.  I wrote 6 folders of pictures to the disk.  But even when you copy the disk to another disk, windows explorer shows nothing.  I would really like to retrieve these pix and put them on an external hard drive.  Any help would be appreciated.  thanks.