my site had two languages, i installed the third language pack today and i get an issue

if i switch to english or another old language, go to admin->catalog->option name manager, the options display correctly,
but if i switch to the new language, there's no option there, only after i add a new option, it owuld be shown, but it doesn't show the options that i added before installing this language pack

even if i switch to english, then edit the current options, after i save it, only the languages of options which added before the new language pack installed are saved, the new language options are keep empty even after i click on the save button.

i'm not sure what i missed, cause when i installed my first language pack, everything goes well, but this time, when i install this new language pack, i can't get the attributes work right,

any help?