order of appearance

hello i have a problem of DraftSight, about the command order of appearance. in my case the command is executed when it has no effect on the objects in which it is used. for example if I want to bring a line above a raster image, it does not happen. I already tried to reinstall the program, but nothing. instead on other computers all works regularly. I add also that we use the program on mac os x.

thanks for your attention and for any advice that you will give me

bye bye