LDraw NXT 2.0 wheels missing

[pepijndevos]

I'm trying to make an LDraw file from my NXT robot, I downloaded unofficial parts, but I'm missing a rather crucial part: the wheels, part 56145.

That is, the wheel is there, but I can't see it. What can I do?

I noticed the wheel is made from subparts of another wheel, part 54087, which also shows up empty. The dat files do contain all sorts of stuff. The subparts do show up in Bricksmith.

I redownloaded the part, ran mklist.exe, reloaded the parts in Bricksmith. Still shows up empty.

I hope anyone can help me, or tell me where to look.