Hi. I'm trying to connect my Neewer TT560 Speedlite with my Canon 77D with the hotshoe but it doesn't seem to be working. On the flash I've done a "test" flash and it works. So the flash physically works. I connect it to the hotshoe and tried in "M", "S1" and "S2". And it doesn't work on any of those modes. When I go to settings on my camera it says flash not detected. When using it on my friends Rebel T3i it works. So not sure what to do. The camera is only 1-2 months old and barely even used.