Surface looks faceted - set shading mode for models?

Hi,

I have a simple problem regarding a model I imported from a *.wrl file to a *.dts file via Blender. While all other models in my environment render smooth surfaces, this models looks... hmmm... faceted. Is there a switch in the material.cs oder in Blender I have to set to get interpolated surfaces? Looks like a flat rendering compared to a Phong shading which I need.

Possibly it's a Blender setting - but which one?

Thanks for help,

Tobias