Okay so, whenever I try to change something on the composition preview video, it doesn't work. I have to go to a completely different screen and go back to see what ive changed, and when I try to ram preview it doesn't even do anything but play the music. Im not very tech savy so I don't know any big words, so try and dumb stuff down for me okay? Please help me, Thank you.
Nobody can tell you anything without proper system info or other technical details like what version of AE, what your settings are and so on.