Trouble installing Leopard

My Mother just got a new Macbook and it comes with Leopard install dvds.

I was wondering if I am allowed to install Leopard onto my 1 year old Macbook. Because for some reason when I insert the dvd and let it restart, after choosing English as my preferred language it just stops and said you are not allowed to install this software.

I have enough free space and my computer is new (and running 10.4.11) and fits all the system requirement as far as I know.

Any help would be appreciated.

Thanks

if it came w/ the computer it was only for that comp

Thanks for the reply. I thought that this would be the case but wanted to know for sure.