freePBX language problem

I have installed asterisk1.8 、freePBX2.9 in ubuntu 10.10.
Everything goes well except 1 problems.
When I enter into freePBX and select my home language “Chinese”,the window reload,but nothing hapenned.In the dir /var/www/html/admin/i18n ,all the languages diplayed in the web are existed .I don’t how to solve this problem.When I seclected other language in my freePBX ,the result was the same.
Thanks in advance for your help…