in your start up line you need
+set fs_homepath "silent"
your xp save files are in the database directory, in our case this is in our et install directory server/silent/database and is set in your silent.cfg file
// Shrubbot and Database
set g_dbDirectory "database"
once you get the shrubbot working your xpsave will work as they use the same directory. for doing rcon commands we find it easier to use rcon unlimited when you do a command in that you should a result strasight away, to check another way check in the console, the server log will show where its trying to save the xp to or will show an error saving it.