After creating OS 3.9 Emergency Disk: Cannot open "cd.device" unit 2

[Snowwie]

After I successfully created an emergency disk from the OS 3.9 cd-rom I restarted the Amiga.

After the first reboot it said: "Cannot find df0:"

After the second reboot it said "Cannot open "cd.device" unit 2".

I use an external Archos Overdrive CD-rom player.

This is the startup-sequence OS 3.9 created on the ED:

; $VER: Emergency-Disk Startup-Sequence 44.8 (18.11.2000)

CD SYS:
If Exists C:IDEFix
C:IDEFix
EndIf

C:SetPatch QUIET
FailAt 21

If Exists :DEVS/DOSDrivers/EMERGENCY_CD
C:Mount >NIL: :DEVS/DOSDrivers/EMERGENCY_CD
EndIf

If Exists :DEVS/DOSDrivers/CD0
C:Mount >NIL: :DEVS/DOSDrivers/CD0
EndIf

If Exists :DEVS/DOSDrivers/CD1
C:Mount >NIL: :DEVS/DOSDrivers/CD1
EndIf

If Exists :DEVS/DOSDrivers/CD2
C:Mount >NIL: :DEVS/DOSDrivers/CD2
EndIf

If Exists :DEVS/DOSDrivers/CD3
C:Mount >NIL: :DEVS/DOSDrivers/CD3
EndIf

AmigaOS3.9:Emergency-Boot/C/Assign SYS: AmigaOS3.9:Emergency-Boot
Resident SYS:C/Assign FORCE
Assign C: SYS:C
Path C:
Assign S: SYS:S
Assign L: SYS:L
Assign LIBS: SYS:Libs
Assign DEVS: SYS:DEVS
Assign FONTS: SYS:Fonts

Assign EDISK: :

Assign ENVARC: EDISK:Prefs/Env-Archive

C:MakeDir RAM:T
Assign T: RAM:T

CD SYS:

Assign SYS: EDISK: ADD

Execute S:Startup-Sequence
IF EXISTS EDISK:S/User-Startup
Execute EDISK:S/User-Startup
ENDIF

Assign SYS: EDISK: REMOVE

EndCLI >NIL: