Problem of displaying Chinese & Thai font in Java J2ME games on Samsung D520

Hi all,
I have search through multiple forum to look for the respective solution for this problem but still i do not find any solution to this problem.
I have Samsung SGH-D520 on hand which is able to display the Chinese & Thai font on the phone menu's by using the pre-set system language. Using the same code in java J2ME game to display english, chinese and thai character, the result was it failed to display any single Chinese & Thai font. But it can sucessfully display the English character properly. The result for the code to display chinese and thai character, it does not show anything on the screen at all.
Hopefully anyone who have encouter this problem before can help me to solve this problem.
Thanks.