[otrs] SysConfig Admin section not actually changing anything

Hi there I'm using debian as my distro and therefore using the debian package of otrs2. When trying to alter different settings by using the SysConfig option under Admin, the changes don't replicate in the system. I have tried restarting the web server, but this doesn't work either. Where are these changes saved? In the database or in some flat file? How can I see these changes? And another thing, every time I try to alter the Config.pm file I have to restart the web server, if I don't I get a pretty nasty error on the web interface, no matter what I try to do. Why? - Marius