allright guys, it gave me the same error. tried to start with -x (didn't work.)
disabled sound & network in BIOS. And tried to unplug cable. (didn't work.)

It's really pissing me off.

- Maybe i have to re-plug all the cables in my pc?

- UPDATE:

Seriously, i don't have any ideas anymore. I've tried to take most of the cables out and putted them back on. Didn't work.
Changed the Primary Master to Slave with my cable. Didn't work. Changed it back. Didn't work.
CMOS resetted the whole motherboard. Didn't work. Man, this is killing me!
So many other people are running Mac's on their P5K. Why not me?