Booting problems after installing OS3.9

[Phantom]

I just installed (again!) AmigaOS 3.9 on my Amiga. I used around 900MB for the first and bootable partition which holds all the necessary files of AmigaOS 3.9.

I used HDToolBox to create this partitions from the emergency disk that came together with the AmigaOS 3.9 cd. I left the default AddBuffers to 80.

My Amiga booted only once, and then in every reboot I see only a black screen.

When I enter the Early Startup Menu, I can see that my partition DH0 is recognisable (scsi.device, unit=0, priority=0). My Amiga can boot up when I use "Boot with no start-up sequence" and then with LoadWB from the shell, I can see the icon of my system partition. I checked the startup-sequence protect options and they are (s-rwed).

Is there any problem with my startup-sequence file? Any ideas? Please help.

[Phantom]

Before I had installed also CyberGraphiX 4.0. Now I installed AmigaOS 3.9 again with no CGX and my Amiga boots again several times. Is that strange? What can cause my Amiga not to boot when I install CFX 4.0? :-?

This happened also with Picasso96 (I tried it now).

[Phantom]

Surely it's not the AmigaOS 3.9 cd (thanks for the info to try it), but that's strange. Everytime I install P96 or CGX 4.0 my Amiga boots whenever it wants. When I completely remove these two apps my Amiga boots normally. Any ideas what can cause this problem? :-?