Cannot boot Leopard Install

MacOSX1058

Registered
although my eMac reads my SL Leopard install DVD it refuses to boot from it. So then i tried my Leopard Install HDD and Mac OS X says it is not Initalized so i reformatted it put the image of Leopard back onto it and it still will not boot. Is this a issue with my mac or an issue with the install media?
 
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