lucy24 - 11:20 am on May 10, 2012 (gmt 0)
That "sef" isn't simply a button. It causes things to happen behind the scenes, probably by enabling a package of rewrites. So you need to find those rewrites and study them. Or throw out the default sef and do the whole thing yourself manually.
Fortunately, there are people hereabouts who know much more about the inner workings of joomla than I do ;) You just have to wait for the right time zone to roll around.