[LeoCAD] Library management

[Pierre A.]

Hello to all

I'm using LeoCAD 0.82.0 (latest) on Linux Ubuntu 14.04 (install using this)
I'm using LDraw 2014-02 library without "parts.lst" file.
All work fine.

Now I try to add "LS02.dat" & "LS100.dat" parts to generate input to LSynth.
As soon as I add the .dat files, on next LeoCAD start, I see these parts LeoCAD part browser.
But parts are invisible i.e. without any graphic displayed.
Can a person explain me my wrong way?