Some strings boken in Vietnamese language pack

[tt01t2]

I'm making Vietnamese language pack, most of strings look nice but there're some broken strings:
http://img244.imageshack.us/img244/6382/winamp1wu1.th.png (http://img244.imageshack.us/my.php?image=winamp1wu1.png)
http://img301.imageshack.us/img301/4310/winamp2kl8.th.png (http://img301.imageshack.us/my.php?image=winamp2kl8.png)

I'm using Winamp 5.25, WindowsXP SP2, VS.Net 2005 (but I don't know much about VC++, just for compile :D)
Pls help me to find out. Thanks

[tt01t2]

Nobody helps me?

Pls tell me that problem's because of Winamp or 'cause of me? I have seen a Frence language pack that is localized fully (skin, Media Library,...). But I don't know Frence to them how to do. What a pity! :(

[Maxim]

? (question marks) appearing usually means it's a Unicode string that's failing to be fully converted to a MBCS string, for whatever reason. You should find it's the same letters being changed in each case. This might be due to the incomplete conversion to Unicode within Winamp, maybe combined with an incorrect operating system setting ("Language for non-Unicode programs" in English, needs to be a suitable Thai setting for this case). If you wait for 5.25 final, it might just work anyway.

French is OK because all of their extended characters fit in most systems' 8-bit character set anyway, so the conversion has more chance of success.

[tt01t2]

Thank Maxin for anwser.
I have set "Language for non-Unicode programs" to Vietnamese and tried again but that problem's still there. Strings in treeView, link and tooltip are broken while the others look ok. I don't think that just because of mapping from Unicode to MBSC.
Any suggestion please!? :(