Why is that my current time indicator won't move until the end of my composition? I try to change my composition setting several time but still, the problem's unsolved. Pretty3 please help me...!!!
As I suspected.... There's nothing wrong. You are at the last frame and since AE operates on genuine time and frames are sampled at the beginning of the frame duration, you are never at the actual "end" of the comp.
Your composition is only 10 frames long. The timeline is expanded to the maximum. The gray area is just showing you the last frame. There is nothing wrong.
Change the composition length to 1 minute, then move the time line zoom control to the left and the gray line will go away. As you zoom in to the timeline by moving the zoom level to the right, when you get to the point where it is easy to see a single frame the gray line will appear.
Here I am at frame 2 zoomed all the way in.
So there is nothing wrong.