I'm using JoomSEF and wanted to modify some of the existing SEF urls slightly. Tried to get the old SEF Url to redirect to the new one in order to maintain the hits from search engines. I tried this by putting it in \"View/Edit 301 URLs\" as well as through \"View/edit SEF Urls\". Both of which don't work as expected, The old Url produces a 404 error. Does anyone know how this can be done?