How can I fix the shadow rendering problem with the custom blueprint?

Hi everyone

I have a small problem regarding to rendering the shadows of my custom blueprints. I’ve created two pickup items which are the health and damage boost item. The damage boost item’s shadow is being cropped as you can see in the screenshots below. I have tried setting different setting on how the object should be rendered but nothing has changed. (These items I have created in blender 2.70a if may have an effect on the problem.)

Is there a way to fix it?

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