Knowing what you know about coding, and the fact that my E53 won't start, how would or should I go about testing or coding?

My cable is essentially a K cable, pins 7/8 are jumpered, and it does 'read' the info from the E53, but with Rheingold I can't program with this cable. So I think I need an ICOM cable or something else. Hoping someone with Rheingold and E53 experience can give me some input?

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2002 X5 4.4i sport/NAV/ski - upgrades: electrochromatic mirror, aluminium pedals, tinted front windows, 20" rims, //M wheel w/ paddle shifters, CarPC (CarX)