Disk Error on Fedora 16 after inserting the DVD setup disk

Hello,
I have got many software CDs with me. I like exploring all the software and to learn the new technologies. One such software is F16. When I inserted the DVD and continuing with the process, suddenly my DVD came out throwing some Fedora disk error.
Please fix this issue as I have no idea on this as I have never faced this error.
Thank you.
