CD roms not showing

Hello, got a funny one cant for the life of me work it out my mother board died on my nice computer so have transfered all of the parts to an old dell dimension 8300 and the hard drive and floppy drive work fine but the computer be it windows or the actual bios refuse to notice my sony cd drom or my lg lightscribe drive tried all the usual stuff but cant get it to notice that they are pluged in the hard drive is sata but all the other parts run of the ide connections some ideas would be good.

Rob