[f1del1ty.oXi]

visiblemaxplayers "20" I think, try putting it in server.cfg, and it should show 20 intead of 19. I'm thinking it goes in liblist.gam though, so try both places.

And as katel or whatever his name is said, uncomment the plugin itself if your not reserving any slots. although the plugin is adminslots.amxx, not slotreservation.amxx.