have you tryed to play with different resetlevel values in SYS:S/Startup-Sequence? (and set bootdevice as well)
; Bootdevice can be used to specify the MorphOS partition if you have more than one
; bootable partition and the MorphOS one doesn't have the highest boot priority. Remember
; to use partition names, not volume names! This option requires the 'bootdevice' keyword
; like in the example below:
; set bootdevice "bootdevice=DH1"
; Leave the var blank if you want to boot from the default boot partition!
set bootdevice "bootdevice=CDH9:"
; The resetlevel and delay variables are there for you to tweak if MorphOS startup doesn't
; reboot the machine properly after loading MorphOS files.
;
; The possible resetlevel values are:
; 0 exec/coldreboot (System Reboot)
; 1 MMU switch off + normal reset in chipram (default)
; 2 MMU switch off + double reset in chipram
; 3 MMU switch off + Cyberstorm HW Reset in chipram
; 4 for (;

;..waiting for manual reset by your hands:-)
; 5 MMU switch off + normal reset in fastram
; 6 MMU switch off + double reset in fastram
; 7 MMU switch off + Cyberstorm HW Reset in fastram
set resetlevel 5
set delay 1
ah ... and the very latest SYS:Boot/roms/module.com1 is bugged.
You have to use the one of the very first Morphos 1.4.5 release (10 August 2005)