Why do the fixations stay in almost the same location?

[gyc9709]

Dear authors, I use the default configurations, except that I set the conf_struct.gaze_params.ngazes=9, which was 1 in the case that "foveate" is 0 in "nswam.m", as shown in the picture . But why does the scanpath generated stays almost in the same location as shown in the picture? The resolution of my images is (1600, 800). So I want to ask whether the fixations just should be like this, or whether I should change the configuration? I only want the output scanpaths, and I don't care about the saliency maps. Thanks a lot if you can reply.