i just noticedn there actually two gaps...from another 22 sec to 1 min
hey cool brush! you imported your sequence as 30.fps
but your timeline is at 24FPS
your sequence could be neither of those. so this is a mess. first you need to know what frame rate is your sequence was originally and set the frame rate in the interpret footage dialog in the project window. (right click on the footage item-> interpret footage)
after you are done with that, make it a habit to drag the footage to the Composition icon so you will get exact match in duration and frame rate of your footage
and if you still have problems try to be specific and we will move on from there.
Thanks it worked. i completely forgot that