I just got a copy of MAC OS 10.4 on CDs and the disc won't load. I'll put the disc in and the MAC spits it out. I rebooted holding down the C button and it spits the disc out. So what gives? I have the right install discs which are for iMacs.

This is the model iMac that I am upgrading.

http://www.everymac.com/systems/apple/imac/stats/imac_350.html