Mac does not see my new hd

Hello people,

i need some serious help.

I have an Apple PowerMac G5 Quad 2,5.

I had a panic kernel so i replaced my hd with a new one. When i put the tower on i got the folder with flashing questionmark. When i put the tower on holding alt i see two arrows. Left a rond one and on the right an arrow pointing to the right. But there is no HD????

When i try to start Panther cd install disc 1 from 3 (Black and silver disks) I see the apple logo for a while and after that in changes into a circle with a slash in it.

What is wrong? Did i do wrong