Page Not Found

Sin installing blackfyre theme, any old or new page I create I can not view the page
I get “page not found” this also includes the Slider page I have this installed on internal
server for now.

The requested URL /JupiterForce1/test-post/ was not found on this server. (New Page)
The requested URL /JupiterForce1/hello-world/ was not found on this server. (Old Page)
The requested URL /JupiterForce1/slider/test-slider/ was not found on this server.

I have tried to switch back the previous them and still having the same issue.
all pages where working up to my installing this theme

any hint as to may have what caused this ? or how to fix ?