the camera in new standard assets is not taking inputs in unity 5.0

Hello unity community, i’ve downloaded unity 5 just ago with new standard assets. After that i dragged the free look cam prefab in the new camera assets into the scene and given it a simple target (a cube primitive). Now the problem is that the camera doesn’t rotate around the camera with user input like mouse like it does before in beta standard assets. Actually i’am upgrading my project from unity 4.5 to 5.0 and i’ve used the camera prefabs earlier in my project but the same prefab doesn’t work in unity 5. Please someone help me with this. Any kind of help

Delete the InputManager.asset in the ProjectSettings folder or set everything manually to the default settings.