of course you'll get access denied when using that command. for the copy command optical devices are read only, it doesn't have the ability of burning files so the error is legit
You cannot use the command prompt to copy from a floppy to a CD, you would need Windows Explorer to do that, and you would need to finalize the disc in order for the data to be read from another PC.http://windows.microsoft.com/is-IS/windows7/Burn-a-CD-or-DVD-in-Windows-Explorer
Edit: I am also going to step outside of the box in this case and ask you to make sure your CD drive is actually capable of writing CDs (which would make it a CD-RW drive instead of a CD-ROM). I only do this because you asked a question that is suitable for the 1990s and not so much today.