motion trail

I am using this cool addon motion trail.
http://wiki.blender.org/index.php/Extensions:2.6/Py/Scripts/Animation/Motion_Trail

Works great but somehow when I wanted to finish my animation the motion trail has an interrupted line.
I cannot edit the yelllow dots after the point when the line is interrupted.


Have done a new recording from the begin to end now it works great.
Problem solved.