ok, here is another problem i couldnt solve so far.
i changed the main.tpl.htm and added some divs and other stuff. all works fine except when i refresh the site or logout. then all the stuff i added in the main.tpl.htm has gone.
it seems like any other template has been loaded - but didnt find any hint in the code yet. i think its releated on the $_SESSION?
maybe anyone can give me some hints, ty