Motion tracker tracks only a part of video


Hello guys, i have problem with c4d motion tracker , footage has 150 frames , i hit 2d tracking hit create auto tracks, i see the tracking points ,then hit auto track and problem is begining right here , it solves 2 d tracking only for a first part of video in the end of the video there is 2-3 track points. Please if anyone know how to solve this problem let me know , everything is ok with software 2 days ago i did perfect tracking !