Problems With Static Analysis.

I am having problems when I model a static analysis upon adesignthat is made out of three different extruded parts (eachwithdifferent material properties).

The design itself consists of an outer ring (a rubber tire),aninner ring (the solid wheel) and plastic supports inbetween.

When I run the analysis on Cosmos, the deflection of the tiredoesnot take into account either of the center elements (i.e. thewheeland supports) and the rubber tire deforms right through bothofthem.



I have tried using "Contact gaps" but it has madenodifference.
I am using Solidworks 2006 SP4.1 and the latest SP ofCOSMOSWorks.

Thank you for any help.

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P.S. The Solidworks file can be foundhere.
P.P.S. A picture of the "tweel" can be foundhere.SolidworksSimulation