How can I show a XHTML page in my HOST?

i'm new in server-related topics... I want to show my page xhtml from my project Java Enterprise Project with PrimeFaces, I upload my project in a free host for test and know a bite about this.

When I create a .html page in my host folder I can enter without problems and show the page, but with the .xhtml pages from my project nothing happens.

How can i show my project's pages ?.