You provide, as usually do many users, really few details:
1) I guess you reflashed the box, from what you say: did it succeed?
2) If so, what happened immediately after the flashing: did the setup wizard start to configure your box?
3) If so, what happens if you press MENU? If you see the menu it simply means you have a clean image with no channels and bouquets, and the image is simply at the stage where you must perform a scan of channels.
Because if you say you put "the USB stick to upgrade BH", no upgrade is possible without losing every settings.