I'm using FSX, but not sure that's the reason for what I'm observing.
The issue is:
From within the 2D cockpit I can't see the taxilights.
No problem from any outside views. (I don't have a VC yet, so haven't tested that)
The XML code for switching them on an off is correct (TOGGLE_TAXI_LIGHTS) so no problem here either.
Landing lights (which works more or less the same way) are fully visible both from outside and in.
Same effect used for other aircraft (standard) so can't really be that either ..... any ideas?

Could it be a model issue?
Model is in GMAX, are the right and wrong ways of defining TAXI lights???