bender2crystal

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background:
Newbie, Install CrystalSpace and worked through examples, Installed Bender and worked through examples, installed bender2crystal(b2c) and worked though examples. OS X.
Problem:
When b2c executes walktest the objects float away. The same is true even if I load an example(*.blend) or run walktest separately. Any ideas of what I'm not doing correctly?

[bookeater2]

Is it only the level you made where this happens, or what map is it? You are aware that if the camera is below the floor, or there is no floor, gravity will pull you down?

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First, thanks for the quick responce.
To answer your questions there was 1 level and for a test a simple cube. However, your second question I believe addresses my problem. My understanding of the "gravity" issue is that I read something somewhere  that alluded to it but did not explain it. I attempted to add a "floor" by adding a plane mesh perpendicular to the Z-axis and below everything. Still drifted. However, I did come to my senses over the weekend and realized that in BLENDER 8 and numeric 8 are not the same. 8 turn off gravity and that stopped the drift. Now I'm still in the dark as to how to properly generate a floor to build my objects over.
Again thanks!