Graph stays a horizontal line even with different keyframe values amd easy ease.

Hi I'm having trouble with my graphs. They were working completely fine until suddenly on only one of my projects the graphs just don't work. I have both keyframes being different, they have been easy eased and auto-zoom graph height is on. To have a graph I must change a value to be extremely high to have a big difference. My graphs also are different colours, the same colour as the value I have selected gets highlighted for some reason, instead of being gray like usual. I really don't know what to do.