Matlab crashes when using simulink 3D animation

Don't know why but it crashes when I simulate the differential equation I connected to the virtual reality environment. In the simulink interface there is a VR sink object. When I click it virtual reality environment pops-up, when I hit run, it runs but then matlab freezes and it crashes. What might be the problem ?

I tried the same scene with 2010b and 2012b versions. The result is the same.