Fedora Core 5 Install Error

[dboone at MIT.EDU (Derrick S Boone)]

Hi Everyone,

I'm fairly new to linux, and am trying to do a complete install of Fedora Core 5
over my current core 4 partition. When I use the graphical installation utility,
I receive the following error:

"An error occurred unmounting the CD. Please make sure you're not accessing
/mnt/source from the shell on tty2 and then click OK to retry."

When I click ok, nothing happens, the window pops up or the system hangs. Any
ideas on what I should do?

Thanks,
Derrick Boone