Change model of prefab in SampleAssets

Hey people !

I'm currently working on a project using the Asset "SampleAssets" providing by Unity3D... In this asset, i'm using the prefab ThirdPersonCharacter and the camera for a game in the Third Person. But now I want to change the model of this prefab, so I read the documentation supply with the assetand It said that you have just to delete the actual model and replace by your. Thing that I have done but It doesn't work, the character did'nt move but can rotate.

There is something to do ? The model I'm using have animations and all needed. I can link you a download link to this model if needed