Does it work in other browsers? If not, it is most likely a file permission problem, a path problem or case mismatch.
First check if other browsers can display the content on the webserver. If this is not so, set the permissions of the files to a state where they can be accessed. If this does not help, try locating the precise point of failure by opening a error/debugging console of the browser and locate the first file that failed and try to figure out why it did so.