graph image

[radix]

Hello everyone!
i came from China, i use cacti to see my LAN traffic,it's every useful,but this time i have a problem.

When i want to change the character to Chinese,the character on graph is changed.the "Day","Year"character is wrong,but the "Week" is right.

How can i solve it ,thank you!!

following is the graphs.

[radix]

But the week graph is right,and the year graph is wrong again!
What's wrong with it ?how can i change it ?
Thank you!
Bye the way ,my english is so poor that must be something wrong in my sentences,sorry! :(