Unity Web Player Build Black Screen

The project I'm working on is running perfectly on Unity Editor and the platform is chosen to be Web Player. So I build this project as a Web Player project and the building is successful, but the generated HTML file shows a black screen after loading. I don't really think it's the problem of camera direction because the project runs perfectly on the built .exe file and in Unity Editor.

There is no exceptions or errors happen during the building process according to the Editor.log file. I can't find any solution from internet since that most of the solutions are talking about reinstall the web player and reboot you computer. Could anyone please help me with this problem?

Update:

I've tried to add a new camera into the scene and it actually shows something. Would that be the case that scripts is not running?