I had the same issue when I got my Hopper as well. What I did (not sure if this is an actual solution, but it worked for me) was add both Fox SD and Fox HD to my custom guide. Originally, only Fox SD would show up, so I went back in, added Fox HD again, then after saving but before checking the guide again, reset my Hopper. Upon reboot, Fox HD showed up in my custom guide, so I took the SD version out. Hope it works for you!