[Cube] can't install Tiger on Cube with GigaDesign M-7457 (1.5 GHz)

[Stefan]

Hello Cube-friends,


just tried to install Panther on my cube.

Automatic restart from Tiger-DVD doesn't work.
When starting with pressed "C", booting begins from DVD, with grey 
screen, Apple and rotating lines.
After a while (still grey screen, rotating lines) the apple is 
followed by a "no trespassing"-icon.

Does anybody have ideas about reaseons or - better - solutions?

My Cube has last firmware, a Gigadesigns 1.5 GHz (7457) Upgrade and a 
GeForce 4 MX.


Hopefully
stefan