Runtime image on Pocket PC

I'm running an runtime image on a Pocket PC, this image is an visualwork virgin image + ce.pcl parcel + my app (a simple windows with a label and a spin button).

When the runtime image start to draw the window this crash in the method #spinButton: spec into: builder (nil not understood #model:) on the class UILookPolicy, and in the method i can see that the model method is sent to an object instanced more <span onclick="dr4sdgryt2(event)" style="cursor: pointer;">above in the same method.
This runtime image run normally in Windows XP for this reason i discard a problem in the generation of the runtime image.

Any idea?

Regards
Andrés