ERROR: Cannot open ROM file. when trying to do appletalk

[diakonia]

I was following the steps at http://www.emaculation.com/doku.php/app ... heepshaver
but at here I get stuck

"3. In the first terminal window execute:
sudo ~/SheepShaver/SheepShaver.app/Contents/MacOS/SheepShaver
(effectively starting sheepshaver with root privileges)
Or, if you are using the SheepShaver launcher:"

SheepShaver V2.4 by Christian Bauer and Mar"c" Hellwig
ERROR: Cannot open ROM file.

But my path to both the rom and the dsk files are fully qualified - here's my prefs - I'm using a sheep shaver that is bundled - the icon is hypercard.sheepvm

disk /Users/myusername/Documents/hypercard.sheepvm/classic.dmg
disk /Users/myusername/Documents/hypercard.sheepvm/hyper.dsk
cdrom /dev/poll/cdrom
extfs /Users/
screen win/1024/768
windowmodes 0
screenmodes 0
seriala /dev/cu.Bluetooth-Modem
serialb /dev/null
rom /Users/myusername/Documents/hypercard.sheepvm/oldworld.rom
bootdrive 0
bootdriver 0
ramsize 134217728
frameskip 8
gfxaccel true
nocdrom false
nonet false
nosound false
nogui false
noclipconversion false
ignoresegv false
ignoreillegal false
jit true
jit68k false
keyboardtype 5
ether tap0
keycodes false
keycodefile
mousewheelmode 1
mousewheellines 3
dsp /dev/dsp
mixer /dev/mixer
ignoresegv false
idlewait true

What should I do differently

[Ronald P. Regensburg]

When you start SheepShaver executable directly, it will not use the prefs file that is inside the .sheepvm bundle. You will need to setup SheepShaver in the classic way, with settings written to the (hidden) ~/.sheepshaver_prefs file. You can still use full paths to files inside the bundle.

You can easily transfer your settings: Open the prefs file in TextEdit and copy its content. In Terminal type open ~/.sheepshaver_prefs (followed by a return). The file will open in your default text editor, usually TextEdit. Paste the prefs settings, replacing what is already there, and save the file.