move_uploaded_file() problem

Hi, I'm having problem with function move_uploaded_file() under Linux (Slackware 12.2). It simply want execute only that function in php file. So maybe I should add something to http.config file or .... ? I tried to execute that php file under Windows and it's working just fine (I've copied whole project to xampp's htdocs folder and run it normally). And also I have question, does anyone knows how to configure apache (also under same Linux) so that in future I wouldn't have to write <?php but only <? every time I start php code? Thnx, Dusan -- made by Dusan