G5 not upgrading from 10.4.11 to 10.5
I am trying to upgrade my old G5 from 10.4.11 to 10.5.
Every time I put the disc in, it shows up, and asks me to restart, then asks for a password. It then reboots right back into 10.4.11! The old OS!
This driving me nuts! I've checked the spec on the 10.5 box and I seem to be well over spec! 4G Ram in my G5.
Can anyone help?
Macbook Pro 2.5 13" / iMac 2.8 24", Mac OS X (10.5.8), Logic 9