Sounds right.

Have you confirmed that the pins on the DB25 have the correct voltages on? (with a DVM) just incase.

For some reason the ULF sounds like it's not being "registered" on the I-BUS, you have the other stuff connected too, tel-on and mute etc. (I don't think it would make a difference though).

It could be that the fixed phone ibus registration needs to be flushed before it will accept a new telephone module, (i'm just guessing though).

I've been watching the bmwland thread too, I agree, it sounds like the same sort of problem.

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Sept 03, M3, Silver Grey. Retro-fits: Modded Mk4 DVD Drive, OEM Bluetooth, VR Control, Rainbow Speaker Upgrade, Sony SOT Amp, HK Sub, CCFL, Intravee II, NightMode.