Lightmap and Combined Meshes problem

I have problem when using Combined Meshes with object lightmapping in Unity 3.0 when I use both of them and click play button the error occur

Mesh.vertices is too large. A mesh may not have more than 65000 vertices. UnityEngine.Meshet_vertices(Vector3[]) MeshCombineUtility:Combine(MeshInstance[], Boolean) (at Assets/Standard Assets/Scripts/Utility Scripts/MeshCombineUtility.cs:170) CombineChildrentart() (at Assets/Standard Assets/Scripts/Utility Scripts/CombineChildren.cs:66)

this object has vertice around 70-400 vertices when remove lightmapping everything run smoothly as expected.

Anyone have suggestion on this one?