Hyper Neo geo 64 "Xtreme Rally"

Hallo kundige Leutz

Ein guter Kumpel von mir hat sich einen Sit Down Racer angelacht.
Es handelst sich um einen "Xtreme Rally" auf der Hyper Neo Geo64 Plattform.
Problem ist: lässt sich nicht Stand alone starten, dh er sucht nach Netzwerkpartnern, da er sie nicht findet kann man nicht spielen...
Any Ideas:

Hier noch sein Bericht in Englisch:
Please help me, to bring my babe to operation.


The Arcade console is in perfect condition
The orig. Processor starts, until in blue screen, the communication check fails, than with a lot of car pictures on screen, a search countup run endless. I can enter program mode and I have set 4 dipswitches on the small Comm. board in right positions
Twice it went into game, but with slight touch on Processor Unit, in special left top multiplug, the search begins...
Then I bougt a brandnew NIB complete unit, without software and installed it with my origin RALLY X-treme pack. After power on, on blue screen 10 tests OK, the last "device boot checking" gets no OK, but immediately there comes for 2 sec. the white grid on blue. Than black screen with white text: "MACHINE CODE ERROR"

Pls let me know

How I find out, wheather the new Processor unit fits for Rallx X-treme, because there are up to 4 Variations.
How to overcome the Machine Code Error
Can I disable network feature on my old unit?

If quest's from U, pls ask me formore info and other pictures.