ENTMOD:problem when saving and loading the entity saved?

[chelseafc0512]

hi guys .i 'am using entmod plugins with cs 1.6.there is a problem when saving and loading the entity saved i load in offline server with bot)
i play the map de_temple_falls_cz and i have move many entity by weapon_entmover .i want to save it to load later , so i enter:es_save h
when i look at the entity and enter the command:es_grab ,there is nothing notice me that i 've grabbed this entity ,so i don't know which entities has been grabbed. (it's the first problem)
then i save the entity by es_save 0 and quit the game, there is a file de_temple_falls_cz_h.txt ,so i think that the save command is enter correctly
.but the size of the file is 0 kb ,when i open it by notepad ,there is NOTHING in it.so i enter the map de_temple_falls_cz and enter command :es_load h
there is NOTHING happens
any helps would be geatful ,thank you