What I check there is no APEX version 4.0.2.00.09.
What actually you have done?
Just wild guess that problem might be you have not update images to web server.
What web server you are using?
Check that first the apxldimg.sql that came with the patch or new install is adequately locating the new images you are pointing to
if the theme is as different from the original then you have to manipulate the templates of the new theme to make those buttons visible.