When installing X64 on my SN25P I get a reboot at just the point where the text based setup starts, ie just after the drivers for everything have loaded. Can anyone shed any light on what could be happening here?

Spec is;

2GB crucial ram
Athlon X2 3800+ CPU
2x 120GB Seagate 7200.9 SATA II disks
LG Supermulti DVD RW/RAM drive.

Many Thanks