[SOLVED] Need help in retrieval

I have burned a back up CD on a Lite-On CD burner using Nero. I went to the disk today to look at some information and the CD was blank. Knowing that I just viewed the contents not too long ago, I felt this was an impossiblity. I stuck the CD in both the DVD dive and the CD burner and both showed it as blank. The odd part is that when looking in the properties of the DVD & CD burner, the D VD showed it to be full to capacity, and in the CD burner, it showed to be empty. I pulled it up on Nero and the CD had 200MB on it, but did not display the content; therefore, I know it is on it. My question how do I retrieve it?