Text widgets: Japanese charaters not dispalying properly

Hi,
I've migrated from Motif 1.2(with X11r5) to Motif 2.1(with X11r6) recently. With motif 1.2, on japanese locales (e.g. ja_JP.EUC-JP) the text widgets of my application can properly display japanese characters (e.g. file name with japanese chars), I can edit japanese texts.

But with motif 2.1, the text widgets are not properly dispalying japanese charaters. The specific problem is as follows: when I'm editing japanese text (using over the spot method) in text widgets, the text is showing in pre edit area. After I press enter, the text vanishes. Now, if i disable input method and start typing english, it started showing the previously edited japanese chars one by one instead of the english text.

Anyone have any idea what is happening?

Thanks in advance.
-Pralay