When import unitypackage into the Unity, Unity tell me "No Shader Selected"

When I import the AStar Pathfinding Project Pro unitypackage into the Unity, all the models are red, the model’s material shows that " No Shader Selected ".I don’t know where is the problem. Please help me,thank you !!!
The AStar version is Beta 3.3.8. The Unity version is 4.0.1f2.