corrupt or invalid kernel image

I'm sure that this issue has been dealt with before but I can't find it anywhere on the web site directly, the only thing that occurs to me is that I might need to change parameters but I'm not sure how to figure out which ones and just trying a few didn't help.

Every time I try to boot from a CD the options as far as how to boot come up, that menu, and the graphics; but when you select an image there is an error as stated in the subject line.

Help would be appreciated.