Re-installing XP - Error

[hennnerz]

I have a serious problem, which seems ridiculous...

I need to boot from CD-ROM, so I have changed the BIOS settings to make this my #1 boot source.

So now when I boot the computer up, I get the message "Press any key to boot from CD...."

Here I am frantically pressing keys, I have tried all the F1-F12 and all letters etc. I literally can't press any key at this point. So from here on it boots normally and I cannot boot from CD, in order to re-install XP.

Any ideas?